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require ('strict');--[[--------------------------< F O R W A R D   D E C L A R A T I O N S >--------------------------------------each of these counts against the Lua upvalue limit]]local validation;																-- functions in Module:Citation/CS1/Date_validationlocal utilities;																-- functions in Module:Citation/CS1/Utilitieslocal z = {};																	-- table of tables in Module:Citation/CS1/Utilitieslocal identifiers;																-- functions and tables in Module:Citation/CS1/Identifierslocal metadata;																	-- functions in Module:Citation/CS1/COinSlocal cfg = {};																	-- table of configuration tables that are defined in Module:Citation/CS1/Configurationlocal whitelist = {};															-- table of tables listing valid template parameter names; defined in Module:Citation/CS1/Whitelistlocal contentLanguage = mw.getContentLanguage()--[[------------------< P A G E   S C O P E   V A R I A B L E S >---------------declare variables here that have page-wide scope that are not brought in fromother modules; that are created here and used here]]local added_deprecated_cat;														-- Boolean flag so that the category is added only oncelocal added_vanc_errs;															-- Boolean flag so we only emit one Vancouver error / categorylocal added_generic_name_errs;													-- Boolean flag so we only emit one generic name error / category and stop testing names once an error is encounteredlocal added_numeric_name_errs;													-- Boolean flag so we only emit one numeric name error / category and stop testing names once an error is encounteredlocal added_numeric_name_maint;													-- Boolean flag so we only emit one numeric name maint category and stop testing names once a category has been emittedlocal is_preview_mode;															-- true when article is in preview mode; false when using 'Preview page with this template' (previewing the module)local is_sandbox;																-- true when using sandbox modules to render citation---Định dạng ngày tháng.local vi_formatdate = require('Module:Ngày_chuẩn').vi_formatdate---Định dạng số ấn bản.local function vi_formatedition(rawEdition)	if tonumber(rawEdition) then return rawEdition end		local num = mw.ustring.match(rawEdition, "(%d+)th") or	mw.ustring.match(rawEdition, "(%d+)st") or	mw.ustring.match(rawEdition, "(%d+)nd") or	mw.ustring.match(rawEdition, "(%d+)rd")		return num or ""endfunction z._vi_formatedition(frame)	return vi_formatedition(frame.args[1])end--[[--------------------------< F I R S T _ S E T >------------------------------------------------------------Locates and returns the first set value in a table of values where the order established in the table,left-to-right (or top-to-bottom), is the order in which the values are evaluated.  Returns nil if none are set.This version replaces the original 'for _, val in pairs do' and a similar version that used ipairs.  With the pairsversion the order of evaluation could not be guaranteed.  With the ipairs version, a nil value would terminatethe for-loop before it reached the actual end of the list.]]local function first_set (list, count)	local i = 1;	while i <= count do															-- loop through all items in list		if utilities.is_set( list[i] ) then			return list[i];														-- return the first set list member		end		i = i + 1;																-- point to next	endend--[[--------------------------< A D D _ V A N C _ E R R O R >----------------------------------------------------Adds a single Vancouver system error message to the template's output regardless of how many error actually exist.To prevent duplication, added_vanc_errs is nil until an error message is emitted.added_vanc_errs is a Boolean declared in page scope variables above]]local function add_vanc_error (source, position)	if added_vanc_errs then return end			added_vanc_errs = true;														-- note that we've added this category	utilities.set_message ('err_vancouver', {source, position});end--[[--------------------------< I S _ S C H E M E >------------------------------------------------------------does this thing that purports to be a URI scheme seem to be a valid scheme?  The scheme is checked to see if itis in agreement with http://tools.ietf.org/html/std66#section-3.1 which says:	Scheme names consist of a sequence of characters beginning with a   letter and followed by any combination of letters, digits, plus   ("+"), period ("."), or hyphen ("-").returns true if it does, else false]]local function is_scheme (scheme)	return scheme and scheme:match ('^%a[%a%d%+%.%-]*:');						-- true if scheme is set and matches the patternend--[=[-------------------------< I S _ D O M A I N _ N A M E >--------------------------------------------------Does this thing that purports to be a domain name seem to be a valid domain name?Syntax defined here: http://tools.ietf.org/html/rfc1034#section-3.5BNF defined here: https://tools.ietf.org/html/rfc4234Single character names are generally reserved; see https://tools.ietf.org/html/draft-ietf-dnsind-iana-dns-01#page-15;	see also [[Single-letter second-level domain]]list of TLDs: https://www.iana.org/domains/root/dbRFC 952 (modified by RFC 1123) requires the first and last character of a hostname to be a letter or a digit.  Betweenthe first and last characters the name may use letters, digits, and the hyphen.Also allowed are IPv4 addresses. IPv6 not supporteddomain is expected to be stripped of any path so that the last character in the last character of the TLD.  tldis two or more alpha characters.  Any preceding '//' (from splitting a URL with a scheme) will be strippedhere.  Perhaps not necessary but retained in case it is necessary for IPv4 dot decimal.There are several tests:	the first character of the whole domain name including subdomains must be a letter or a digit	internationalized domain name (ASCII characters with .xn-- ASCII Compatible Encoding (ACE) prefix xn-- in the TLD) see https://tools.ietf.org/html/rfc3490	single-letter/digit second-level domains in the .org, .cash, and .today TLDs	q, x, and z SL domains in the .com TLD	i and q SL domains in the .net TLD	single-letter SL domains in the ccTLDs (where the ccTLD is two letters)	two-character SL domains in gTLDs (where the gTLD is two or more letters)	three-plus-character SL domains in gTLDs (where the gTLD is two or more letters)	IPv4 dot-decimal address format; TLD not allowedreturns true if domain appears to be a proper name and TLD or IPv4 address, else false]=]local function is_domain_name (domain)	if not domain then		return false;															-- if not set, abandon	end		domain = domain:gsub ('^//', '');											-- strip '//' from domain name if present; done here so we only have to do it once		if not domain:match ('^[%w]') then											-- first character must be letter or digit		return false;	end	if domain:match ('^%a+:') then												-- hack to detect things that look like s:Page:Title where Page: is namespace at Wikisource		return false;	end	local patterns = {															-- patterns that look like URLs		'%f[%w][%w][%w%-]+[%w]%.%a%a+$',										-- three or more character hostname.hostname or hostname.tld		'%f[%w][%w][%w%-]+[%w]%.xn%-%-[%w]+$',									-- internationalized domain name with ACE prefix		'%f[%a][qxz]%.com$',													-- assigned one character .com hostname (x.com times out 2015-12-10)		'%f[%a][iq]%.net$',														-- assigned one character .net hostname (q.net registered but not active 2015-12-10)		'%f[%w][%w]%.%a%a$',													-- one character hostname and ccTLD (2 chars)		'%f[%w][%w][%w]%.%a%a+$',												-- two character hostname and TLD		'^%d%d?%d?%.%d%d?%d?%.%d%d?%d?%.%d%d?%d?',								-- IPv4 address		'[%a%d]+%:?'                                                            -- IPv6 address		}	for _, pattern in ipairs (patterns) do										-- loop through the patterns list		if domain:match (pattern) then			return true;														-- if a match then we think that this thing that purports to be a URL is a URL		end	end	for _, d in ipairs (cfg.single_letter_2nd_lvl_domains_t) do					-- look for single letter second level domain names for these top level domains		if domain:match ('%f[%w][%w]%.' .. d) then			return true		end	end	return false;																-- no matches, we don't know what this thing isend--[[--------------------------< I S _ U R L >------------------------------------------------------------------returns true if the scheme and domain parts of a URL appear to be a valid URL; else false.This function is the last step in the validation process.  This function is separate because there are cases thatare not covered by split_url(), for example is_parameter_ext_wikilink() which is looking for bracketted externalwikilinks.]]local function is_url (scheme, domain)	if utilities.is_set (scheme) then											-- if scheme is set check it and domain		return is_scheme (scheme) and is_domain_name (domain);	else		return is_domain_name (domain);											-- scheme not set when URL is protocol-relative	endend--[[--------------------------< S P L I T _ U R L >------------------------------------------------------------Split a URL into a scheme, authority indicator, and domain.First remove Fully Qualified Domain Name terminator (a dot following TLD) (if any) and any path(/), query(?) or fragment(#).If protocol-relative URL, return nil scheme and domain else return nil for both scheme and domain.When not protocol-relative, get scheme, authority indicator, and domain.  If there is an authority indicator (oneor more '/' characters immediately following the scheme's colon), make sure that there are only 2.Any URL that does not have news: scheme must have authority indicator (//).  TODO: are there other common schemeslike news: that don't use authority indicator?Strip off any port and path;]]local function split_url (url_str)	local scheme, authority, domain;		url_str = url_str:gsub ('([%a%d])%.?[/%?#].*$', '%1');						-- strip FQDN terminator and path(/), query(?), fragment (#) (the capture prevents false replacement of '//')	if url_str:match ('^//%S*') then											-- if there is what appears to be a protocol-relative URL		domain = url_str:match ('^//(%S*)')	elseif url_str:match ('%S-:/*%S+') then										-- if there is what appears to be a scheme, optional authority indicator, and domain name		scheme, authority, domain = url_str:match ('(%S-:)(/*)(%S+)');			-- extract the scheme, authority indicator, and domain portions		if utilities.is_set (authority) then			authority = authority:gsub ('//', '', 1);							-- replace place 1 pair of '/' with nothing;			if utilities.is_set(authority) then									-- if anything left (1 or 3+ '/' where authority should be) then				return scheme;													-- return scheme only making domain nil which will cause an error message			end		else			if not scheme:match ('^news:') then									-- except for news:..., MediaWiki won't link URLs that do not have authority indicator; TODO: a better way to do this test?				return scheme;													-- return scheme only making domain nil which will cause an error message			end		end		domain = domain:gsub ('(%a):%d+', '%1');								-- strip port number if present	end		return scheme, domain;end--[[--------------------------< L I N K _ P A R A M _ O K >---------------------------------------------------checks the content of |title-link=, |series-link=, |author-link=, etc. for properly formatted content: no wikilinks, no URLsLink parameters are to hold the title of a Wikipedia article, so none of the WP:TITLESPECIALCHARACTERS are allowed:	# < > [ ] | { } _except the underscore which is used as a space in wiki URLs and # which is used for section linksreturns false when the value contains any of these characters.When there are no illegal characters, this function returns TRUE if value DOES NOT appear to be a valid URL (the|<param>-link= parameter is ok); else false when value appears to be a valid URL (the |<param>-link= parameter is NOT ok).]]local function link_param_ok (value)	local scheme, domain;	if value:find ('[<>%[%]|{}]') then                                          -- if any prohibited characters		return false;	end	scheme, domain = split_url (value);											-- get scheme or nil and domain or nil from URL; 	return not is_url (scheme, domain);											-- return true if value DOES NOT appear to be a valid URLend--[[--------------------------< L I N K _ T I T L E _ O K >---------------------------------------------------Use link_param_ok() to validate |<param>-link= value and its matching |<title>= value.|<title>= may be wiki-linked but not when |<param>-link= has a value.  This function emits an error message whenthat condition existscheck <link> for inter-language interwiki-link prefix.  prefix must be a MediaWiki-recognized languagecode and must begin with a colon.]]local function link_title_ok (link, lorig, title, torig)	local orig;	if utilities.is_set (link) then 											-- don't bother if <param>-link doesn't have a value		if not link_param_ok (link) then										-- check |<param>-link= markup			orig = lorig;														-- identify the failing link parameter		elseif title:find ('%[%[') then											-- check |title= for wikilink markup			orig = torig;														-- identify the failing |title= parameter		elseif link:match ('^%a+:') then										-- if the link is what looks like an interwiki			local prefix = link:match ('^(%a+):'):lower();						-- get the interwiki prefix			if cfg.inter_wiki_map[prefix] then									-- if prefix is in the map, must have preceding colon				orig = lorig;													-- flag as error			end		end	end	if utilities.is_set (orig) then		link = '';																-- unset		utilities.set_message ('err_bad_paramlink', orig);						-- URL or wikilink in |title= with |title-link=;	end		return link;																-- link if ok, empty string elseend--[[--------------------------< C H E C K _ U R L >------------------------------------------------------------Determines whether a URL string appears to be valid.First we test for space characters.  If any are found, return false.  Then split the URL into scheme and domainportions, or for protocol-relative (//example.com) URLs, just the domain.  Use is_url() to validate the twoportions of the URL.  If both are valid, or for protocol-relative if domain is valid, return true, else false.Because it is different from a standard URL, and because this module used external_link() to make external linksthat work for standard and news: links, we validate newsgroup names here.  The specification for a newsgroup nameis at https://tools.ietf.org/html/rfc5536#section-3.1.4]]local function check_url( url_str )	if nil == url_str:match ("^%S+$") then										-- if there are any spaces in |url=value it can't be a proper URL		return false;	end	local scheme, domain;	scheme, domain = split_url (url_str);										-- get scheme or nil and domain or nil from URL;		if 'news:' == scheme then													-- special case for newsgroups		return domain:match('^[%a%d%+%-_]+%.[%a%d%+%-_%.]*[%a%d%+%-_]$');	end		return is_url (scheme, domain);												-- return true if value appears to be a valid URLend--[=[-------------------------< I S _ P A R A M E T E R _ E X T _ W I K I L I N K >----------------------------Return true if a parameter value has a string that begins and ends with square brackets [ and ] and the firstnon-space characters following the opening bracket appear to be a URL.  The test will also find external wikilinksthat use protocol-relative URLs. Also finds bare URLs.The frontier pattern prevents a match on interwiki-links which are similar to scheme:path URLs.  The tests thatfind bracketed URLs are required because the parameters that call this test (currently |title=, |chapter=, |work=,and |publisher=) may have wikilinks and there are articles or redirects like '//Hus' so, while uncommon, |title=[[//Hus]]is possible as might be [[en://Hus]].]=]local function is_parameter_ext_wikilink (value)local scheme, domain;	if value:match ('%f[%[]%[%a%S*:%S+.*%]') then								-- if ext. wikilink with scheme and domain: [xxxx://yyyyy.zzz]		scheme, domain = split_url (value:match ('%f[%[]%[(%a%S*:%S+).*%]'));	elseif value:match ('%f[%[]%[//%S+.*%]') then								-- if protocol-relative ext. wikilink: [//yyyyy.zzz]		scheme, domain = split_url (value:match ('%f[%[]%[(//%S+).*%]'));	elseif value:match ('%a%S*:%S+') then										-- if bare URL with scheme; may have leading or trailing plain text		scheme, domain = split_url (value:match ('(%a%S*:%S+)'));	elseif value:match ('^//%S+') or value:match ('%s//%S+') then				-- if protocol-relative bare URL: //yyyyy.zzz; authority indicator (//) must be be preceded nothing or by whitespace		scheme, domain = split_url (value:match ('(//%S+)'));					-- what is left should be the domain	else		return false;															-- didn't find anything that is obviously a URL	end	return is_url (scheme, domain);												-- return true if value appears to be a valid URLend--[[-------------------------< C H E C K _ F O R _ U R L >-----------------------------------------------------loop through a list of parameters and their values.  Look at the value and if it has an external link, emit an error message.]]local function check_for_url (parameter_list, error_list)	for k, v in pairs (parameter_list) do										-- for each parameter in the list		if is_parameter_ext_wikilink (v) then									-- look at the value; if there is a URL add an error message			table.insert (error_list, utilities.wrap_style ('parameter', k));		end	endend--[[--------------------------< S A F E _ F O R _ U R L >------------------------------------------------------Escape sequences for content that will be used for URL descriptions]]local function safe_for_url( str )	if str:match( "%[%[.-%]%]" ) ~= nil then 		utilities.set_message ('err_wikilink_in_url', {});	end		return str:gsub( '[%[%]\n]', {			['['] = '&#91;',		[']'] = '&#93;',		['\n'] = ' ' } );end--[[--------------------------< E X T E R N A L _ L I N K >----------------------------------------------------Format an external link with error checking]]local function external_link (URL, label, source, access)	local err_msg = '';	local domain;	local path;	local base_url;	if not utilities.is_set (label) then		label = URL;		if utilities.is_set (source) then			utilities.set_message ('err_bare_url_missing_title', {utilities.wrap_style ('parameter', source)});		else			error (cfg.messages["bare_url_no_origin"]);							-- programmer error; valid parameter name does not have matching meta-parameter		end				end	if not check_url (URL) then		utilities.set_message ('err_bad_url', {utilities.wrap_style ('parameter', source)});	end		domain, path = URL:match ('^([/%.%-%+:%a%d]+)([/%?#].*)$');					-- split the URL into scheme plus domain and path	if path then																-- if there is a path portion		path = path:gsub ('[%[%]]', {['['] = '%5b', [']'] = '%5d'});			-- replace '[' and ']' with their percent-encoded values		URL = table.concat ({domain, path});									-- and reassemble	end	base_url = table.concat ({ "[", URL, " ", safe_for_url (label), "]" });		-- assemble a wiki-markup URL	if utilities.is_set (access) then											-- access level (subscription, registration, limited)		base_url = utilities.substitute (cfg.presentation['ext-link-access-signal'], {cfg.presentation[access].class, cfg.presentation[access].title, base_url});	-- add the appropriate icon	end	return base_url;end--[[--------------------------< D E P R E C A T E D _ P A R A M E T E R >--------------------------------------Categorize and emit an error message when the citation contains one or more deprecated parameters.  The function includes theoffending parameter name to the error message.  Only one error message is emitted regardless of the number of deprecatedparameters in the citation.added_deprecated_cat is a Boolean declared in page scope variables above]]local function deprecated_parameter(name)	if not added_deprecated_cat then		added_deprecated_cat = true;											-- note that we've added this category		utilities.set_message ('err_deprecated_params', {name});				-- add error message	endend--[=[-------------------------< K E R N _ Q U O T E S >--------------------------------------------------------Apply kerning to open the space between the quote mark provided by the module and a leading or trailing quotemark contained in a |title= or |chapter= parameter's value.This function will positive kern either single or double quotes:	"'Unkerned title with leading and trailing single quote marks'"	" 'Kerned title with leading and trailing single quote marks' " (in real life the kerning isn't as wide as this example)Double single quotes (italic or bold wiki-markup) are not kerned.Replaces Unicode quote marks in plain text or in the label portion of a [[L|D]] style wikilink with typewriterquote marks regardless of the need for kerning.  Unicode quote marks are not replaced in simple [[D]] wikilinks.Call this function for chapter titles, for website titles, etc.; not for book titles.]=]local function kern_quotes (str)	local cap = '';	local wl_type, label, link;	wl_type, label, link = utilities.is_wikilink (str);							-- wl_type is: 0, no wl (text in label variable); 1, [[D]]; 2, [[L|D]]		if 1 == wl_type then														-- [[D]] simple wikilink with or without quote marks		if mw.ustring.match (str, '%[%[[\"“”\'‘’].+[\"“”\'‘’]%]%]') then		-- leading and trailing quote marks			str = utilities.substitute (cfg.presentation['kern-left'], str);			str = utilities.substitute (cfg.presentation['kern-right'], str);		elseif mw.ustring.match (str, '%[%[[\"“”\'‘’].+%]%]')	then			-- leading quote marks			str = utilities.substitute (cfg.presentation['kern-left'], str);		elseif mw.ustring.match (str, '%[%[.+[\"“”\'‘’]%]%]') then				-- trailing quote marks			str = utilities.substitute (cfg.presentation['kern-right'], str);		end	else																		-- plain text or [[L|D]]; text in label variable		label = mw.ustring.gsub (label, '[“”]', '\"');							-- replace “” (U+201C & U+201D) with " (typewriter double quote mark)		label = mw.ustring.gsub (label, '[‘’]', '\'');							-- replace ‘’ (U+2018 & U+2019) with ' (typewriter single quote mark)		cap = mw.ustring.match (label, "^([\"\'][^\'].+)");						-- match leading double or single quote but not doubled single quotes (italic markup)		if utilities.is_set (cap) then			label = utilities.substitute (cfg.presentation['kern-left'], cap);		end			cap = mw.ustring.match (label, "^(.+[^\'][\"\'])$")						-- match trailing double or single quote but not doubled single quotes (italic markup)		if utilities.is_set (cap) then			label = utilities.substitute (cfg.presentation['kern-right'], cap);		end				if 2 == wl_type then			str = utilities.make_wikilink (link, label);						-- reassemble the wikilink		else			str = label;		end	end	return str;end--[[--------------------------< F O R M A T _ S C R I P T _ V A L U E >----------------------------------------|script-title= holds title parameters that are not written in Latin-based scripts: Chinese, Japanese, Arabic, Hebrew, etc. These scripts shouldnot be italicized and may be written right-to-left.  The value supplied by |script-title= is concatenated onto Title after Title has been wrappedin italic markup.Regardless of language, all values provided by |script-title= are wrapped in <bdi>...</bdi> tags to isolate RTL languages from the English left to right.|script-title= provides a unique feature.  The value in |script-title= may be prefixed with a two-character ISO 639-1 language code and a colon:	|script-title=ja:*** *** (where * represents a Japanese character)Spaces between the two-character code and the colon and the colon and the first script character are allowed:	|script-title=ja : *** ***	|script-title=ja: *** ***	|script-title=ja :*** ***Spaces preceding the prefix are allowed: |script-title = ja:*** ***The prefix is checked for validity.  If it is a valid ISO 639-1 language code, the lang attribute (lang="ja") is added to the <bdi> tag so that browsers canknow the language the tag contains.  This may help the browser render the script more correctly.  If the prefix is invalid, the lang attributeis not added.  At this time there is no error message for this condition.Supports |script-title=, |script-chapter=, |script-<periodical>=]]local function format_script_value (script_value, script_param)	local lang='';																-- initialize to empty string	local name;	if script_value:match('^%l%l%l?%s*:') then									-- if first 3 or 4 non-space characters are script language prefix		lang = script_value:match('^(%l%l%l?)%s*:%s*%S.*');						-- get the language prefix or nil if there is no script		if not utilities.is_set (lang) then			utilities.set_message ('err_script_parameter', {script_param, cfg.err_msg_supl['missing title part']});		-- prefix without 'title'; add error message			return '';															-- script_value was just the prefix so return empty string		end																				-- if we get this far we have prefix and script		name = cfg.lang_tag_remap[lang] or mw.language.fetchLanguageName( lang, cfg.this_wiki_code );	-- get language name so that we can use it to categorize		if utilities.is_set (name) then											-- is prefix a proper ISO 639-1 language code?			name = mw.ustring.gsub(name, '^[Tt]iếng ', '', 1);			script_value = script_value:gsub ('^%l+%s*:%s*', '');				-- strip prefix from script																				-- is prefix one of these language codes?			if utilities.in_array (lang, cfg.script_lang_codes) then				utilities.add_prop_cat ('script', {name, lang})			else				utilities.set_message ('err_script_parameter', {script_param, cfg.err_msg_supl['unknown language code']});	-- unknown script-language; add error message			end			lang = ' lang="' .. lang .. '" ';									-- convert prefix into a lang attribute		else			utilities.set_message ('err_script_parameter', {script_param, cfg.err_msg_supl['invalid language code']});		-- invalid language code; add error message			lang = '';															-- invalid so set lang to empty string		end	else		utilities.set_message ('err_script_parameter', {script_param, cfg.err_msg_supl['missing prefix']});				-- no language code prefix; add error message	end	script_value = utilities.substitute (cfg.presentation['bdi'], {lang, script_value});	-- isolate in case script is RTL	return script_value;end--[[--------------------------< S C R I P T _ C O N C A T E N A T E >------------------------------------------Initially for |title= and |script-title=, this function concatenates those two parameter values after the scriptvalue has been wrapped in <bdi> tags.]]local function script_concatenate (title, script, script_param)	if utilities.is_set (script) then		script = format_script_value (script, script_param);					-- <bdi> tags, lang attribute, categorization, etc.; returns empty string on error		if utilities.is_set (script) then			title = title .. ' ' .. script;										-- concatenate title and script title		end	end	return title;end--[[--------------------------< W R A P _ M S G >--------------------------------------------------------------Applies additional message text to various parameter values. Supplied string is wrapped using a message_listconfiguration taking one argument.  Supports lower case text for {{citation}} templates.  Additional text takenfrom citation_config.messages - the reason this function is similar to but separate from wrap_style().]]local function wrap_msg (key, str, lower)	if not utilities.is_set ( str ) then		return "";	end	if true == lower then		local msg;		msg = cfg.messages[key]:lower();										-- set the message to lower case before 		return utilities.substitute ( msg, str );								-- including template text	else		return utilities.substitute ( cfg.messages[key], str );	end		end--[[----------------< W I K I S O U R C E _ U R L _ M A K E >-------------------Makes a Wikisource URL from Wikisource interwiki-link.  Returns the URL and appropriatelabel; nil else.str is the value assigned to |chapter= (or aliases) or |title= or |title-link=]]local function wikisource_url_make (str)	local wl_type, D, L;	local ws_url, ws_label;	local wikisource_prefix = table.concat ({'https://', cfg.this_wiki_code, '.wikisource.org/wiki/'});	wl_type, D, L = utilities.is_wikilink (str);								-- wl_type is 0 (not a wikilink), 1 (simple wikilink), 2 (complex wikilink)	if 0 == wl_type then														-- not a wikilink; might be from |title-link=		str = D:match ('^[Ww]ikisource:(.+)') or D:match ('^[Ss]:(.+)');		-- article title from interwiki link with long-form or short-form namespace		if utilities.is_set (str) then			ws_url = table.concat ({											-- build a Wikisource URL				wikisource_prefix,												-- prefix				str,															-- article title				});			ws_label = str;														-- label for the URL		end	elseif 1 == wl_type then													-- simple wikilink: [[Wikisource:ws article]]		str = D:match ('^[Ww]ikisource:(.+)') or D:match ('^[Ss]:(.+)');		-- article title from interwiki link with long-form or short-form namespace		if utilities.is_set (str) then			ws_url = table.concat ({											-- build a Wikisource URL				wikisource_prefix,												-- prefix				str,															-- article title				});			ws_label = str;														-- label for the URL		end	elseif 2 == wl_type then													-- non-so-simple wikilink: [[Wikisource:ws article|displayed text]] ([[L|D]])		str = L:match ('^[Ww]ikisource:(.+)') or L:match ('^[Ss]:(.+)');		-- article title from interwiki link with long-form or short-form namespace		if utilities.is_set (str) then			ws_label = D;														-- get ws article name from display portion of interwiki link			ws_url = table.concat ({											-- build a Wikisource URL				wikisource_prefix,												-- prefix				str,															-- article title without namespace from link portion of wikilink				});		end	end	if ws_url then		ws_url = mw.uri.encode (ws_url, 'WIKI');								-- make a usable URL		ws_url = ws_url:gsub ('%%23', '#');										-- undo percent-encoding of fragment marker	end	return ws_url, ws_label, L or D;											-- return proper URL or nil and a label or nilend--[[----------------< F O R M A T _ P E R I O D I C A L >-----------------------Format the three periodical parameters: |script-<periodical>=, |<periodical>=,and |trans-<periodical>= into a single Periodical meta-parameter.]]local function format_periodical (script_periodical, script_periodical_source, periodical, trans_periodical)	if not utilities.is_set (periodical) then		periodical = '';														-- to be safe for concatenation	else		periodical = utilities.wrap_style ('italic-title', periodical);			-- style 	end	periodical = script_concatenate (periodical, script_periodical, script_periodical_source);	-- <bdi> tags, lang attribute, categorization, etc.; must be done after title is wrapped	if utilities.is_set (trans_periodical) then		trans_periodical = utilities.wrap_style ('trans-italic-title', trans_periodical);		if utilities.is_set (periodical) then			periodical = periodical .. ' ' .. trans_periodical;		else																	-- here when trans-periodical without periodical or script-periodical			periodical = trans_periodical;			utilities.set_message ('err_trans_missing_title', {'periodical'});		end	end	return periodical;end--[[------------------< F O R M A T _ C H A P T E R _ T I T L E >---------------Format the four chapter parameters: |script-chapter=, |chapter=, |trans-chapter=,and |chapter-url= into a single chapter meta- parameter (chapter_url_source usedfor error messages).]]local function format_chapter_title (script_chapter, script_chapter_source, chapter, chapter_source, trans_chapter, trans_chapter_source, chapter_url, chapter_url_source, no_quotes, access)	local ws_url, ws_label, L = wikisource_url_make (chapter);					-- make a wikisource URL and label from a wikisource interwiki link	if ws_url then		ws_label = ws_label:gsub ('_', ' ');									-- replace underscore separators with space characters		chapter = ws_label;	end	if not utilities.is_set (chapter) then		chapter = '';															-- to be safe for concatenation	else		if false == no_quotes then			chapter = kern_quotes (chapter);									-- if necessary, separate chapter title's leading and trailing quote marks from module provided quote marks			chapter = utilities.wrap_style ('quoted-title', chapter);		end	end	chapter = script_concatenate (chapter, script_chapter, script_chapter_source);	-- <bdi> tags, lang attribute, categorization, etc.; must be done after title is wrapped	if utilities.is_set (chapter_url) then		chapter = external_link (chapter_url, chapter, chapter_url_source, access);	-- adds bare_url_missing_title error if appropriate	elseif ws_url then		chapter = external_link (ws_url, chapter .. '&nbsp;', 'ws link in chapter');	-- adds bare_url_missing_title error if appropriate; space char to move icon away from chap text; TODO: better way to do this?		chapter = utilities.substitute (cfg.presentation['interwiki-icon'], {cfg.presentation['class-wikisource'], L, chapter});					end	if utilities.is_set (trans_chapter) then		trans_chapter = utilities.wrap_style ('trans-quoted-title', trans_chapter);		if utilities.is_set (chapter) then			chapter = chapter .. ' ' .. trans_chapter;		else																	-- here when trans_chapter without chapter or script-chapter			chapter = trans_chapter;			chapter_source = trans_chapter_source:match ('trans%-?(.+)');		-- when no chapter, get matching name from trans-<param>			utilities.set_message ('err_trans_missing_title', {chapter_source});		end	end	return chapter;end--[[----------------< H A S _ I N V I S I B L E _ C H A R S >-------------------This function searches a parameter's value for non-printable or invisible characters.The search stops at the first match.This function will detect the visible replacement character when it is part of the Wikisource.Detects but ignores nowiki and math stripmarkers.  Also detects other named stripmarkers(gallery, math, pre, ref) and identifies them with a slightly different error message.See also coins_cleanup().Output of this function is an error message that identifies the character or theUnicode group, or the stripmarker that was detected along with its position (or,for multi-byte characters, the position of its first byte) in the parameter value.]]local function has_invisible_chars (param, v)	local position = '';														-- position of invisible char or starting position of stripmarker	local capture;																-- used by stripmarker detection to hold name of the stripmarker	local stripmarker;															-- boolean set true when a stripmarker is found	capture = string.match (v, '[%w%p ]*');										-- test for values that are simple ASCII text and bypass other tests if true	if capture == v then														-- if same there are no Unicode characters		return;	end	for _, invisible_char in ipairs (cfg.invisible_chars) do		local char_name = invisible_char[1];									-- the character or group name		local pattern = invisible_char[2];										-- the pattern used to find it		position, _, capture = mw.ustring.find (v, pattern);					-- see if the parameter value contains characters that match the pattern				if position and (cfg.invisible_defs.zwj == capture) then				-- if we found a zero-width joiner character			if mw.ustring.find (v, cfg.indic_script) then						-- it's ok if one of the Indic scripts				position = nil;													-- unset position			elseif cfg.emoji_t[mw.ustring.codepoint (v, position+1)] then			-- is zwj followed by a character listed in emoji{}?				position = nil;													-- unset position			end		end				if position then			if 'nowiki' == capture or 'math' == capture or						-- nowiki and math stripmarkers (not an error condition)				('templatestyles' == capture and utilities.in_array (param, {'id', 'quote'})) then	-- templatestyles stripmarker allowed in these parameters					stripmarker = true;											-- set a flag			elseif true == stripmarker and cfg.invisible_defs.del == capture then	-- because stripmakers begin and end with the delete char, assume that we've found one end of a stripmarker				position = nil;													-- unset			else				local err_msg;				if capture and not (cfg.invisible_defs.del == capture or cfg.invisible_defs.zwj == capture) then					err_msg = capture .. ' ' .. char_name;				else					err_msg = char_name .. ' ' .. 'character';				end				utilities.set_message ('err_invisible_char', {err_msg, utilities.wrap_style ('parameter', param), position});	-- add error message				return;															-- and done with this parameter			end		end	endend--[[-------------------< A R G U M E N T _ W R A P P E R >----------------------Argument wrapper.  This function provides support for argument mapping definedin the configuration file so that multiple names can be transparently aliased tosingle internal variable.]]local function argument_wrapper ( args )	local origin = {};		return setmetatable({		ORIGIN = function ( self, k )			local dummy = self[k];												-- force the variable to be loaded.			return origin[k];		end	},	{		__index = function ( tbl, k )			if origin[k] ~= nil then				return nil;			end						local args, list, v = args, cfg.aliases[k];						if type( list ) == 'table' then				v, origin[k] = utilities.select_one ( args, list, 'err_redundant_parameters' );				if origin[k] == nil then					origin[k] = '';												-- Empty string, not nil				end			elseif list ~= nil then				v, origin[k] = args[list], list;			else				-- maybe let through instead of raising an error?				-- v, origin[k] = args[k], k;				error( cfg.messages['unknown_argument_map'] .. ': ' .. k);			end						-- Empty strings, not nil;			if v == nil then				v = '';				origin[k] = '';			end						tbl = rawset( tbl, k, v );			return v;		end,	});end--[[--------------------------< N O W R A P _ D A T E >-------------------------When date is YYYY-MM-DD format wrap in nowrap span: <span ...>YYYY-MM-DD</span>.When date is DD MMMM YYYY or is MMMM DD, YYYY then wrap in nowrap span:<span ...>DD MMMM</span> YYYY or <span ...>MMMM DD,</span> YYYYDOES NOT yet support MMMM YYYY or any of the date ranges.]]local function nowrap_date (date)	local cap = '';	local cap2 = '';	if date:match("^%d%d%d%d%-%d%d%-%d%d$") then		date = utilities.substitute (cfg.presentation['nowrap1'], date);		elseif date:match("^%a+%s*%d%d?,%s+%d%d%d%d$") or date:match ("^%d%d?%s*%a+%s+%d%d%d%d$") then		cap, cap2 = string.match (date, "^(.*)%s+(%d%d%d%d)$");		date = utilities.substitute (cfg.presentation['nowrap2'], {cap, cap2});	end		return date;end--[[--------------------------< S E T _ T I T L E T Y P E >---------------------This function sets default title types (equivalent to the citation including|type=<default value>) for those templates that have defaults. Also handles thespecial case where it is desirable to omit the title type from the rendered citation(|type=none).]]local function set_titletype (cite_class, title_type)	if utilities.is_set (title_type) then		if 'none' == cfg.keywords_xlate[title_type] then			title_type = '';													-- if |type=none then type parameter not displayed		end		return title_type;														-- if |type= has been set to any other value use that value	end	return cfg.title_types [cite_class] or '';									-- set template's default title type; else empty string for concatenationend--[[--------------------------< S A F E _ J O I N >-----------------------------Joins a sequence of strings together while checking for duplicate separation characters.]]local function safe_join( tbl, duplicate_char )	local f = {};																-- create a function table appropriate to type of 'duplicate character'		if 1 == #duplicate_char then											-- for single byte ASCII characters use the string library functions			f.gsub = string.gsub			f.match = string.match			f.sub = string.sub		else																	-- for multi-byte characters use the ustring library functions			f.gsub = mw.ustring.gsub			f.match = mw.ustring.match			f.sub = mw.ustring.sub		end	local str = '';																-- the output string	local comp = '';															-- what does 'comp' mean?	local end_chr = '';	local trim;	for _, value in ipairs( tbl ) do		if value == nil then value = ''; end				if str == '' then														-- if output string is empty			str = value;														-- assign value to it (first time through the loop)		elseif value ~= '' then			if value:sub(1, 1) == '<' then										-- special case of values enclosed in spans and other markup.				comp = value:gsub( "%b<>", "" );								-- remove HTML markup (<span>string</span> -> string)			else				comp = value;			end																				-- typically duplicate_char is sepc			if f.sub(comp, 1, 1) == duplicate_char then							-- is first character same as duplicate_char? why test first character?																				--   Because individual string segments often (always?) begin with terminal punct for the																				--   preceding segment: 'First element' .. 'sepc next element' .. etc.?				trim = false;				end_chr = f.sub(str, -1, -1);									-- get the last character of the output string				-- str = str .. "<HERE(enchr=" .. end_chr .. ")"				-- debug stuff?				if end_chr == duplicate_char then								-- if same as separator					str = f.sub(str, 1, -2);									-- remove it				elseif end_chr == "'" then										-- if it might be wiki-markup					if f.sub(str, -3, -1) == duplicate_char .. "''" then		-- if last three chars of str are sepc'' 						str = f.sub(str, 1, -4) .. "''";						-- remove them and add back ''					elseif  f.sub(str, -5, -1) == duplicate_char .. "]]''" then	-- if last five chars of str are sepc]]'' 						trim = true;											-- why? why do this and next differently from previous?					elseif f.sub(str, -4, -1) == duplicate_char .. "]''" then	-- if last four chars of str are sepc]'' 						trim = true;											-- same question					end				elseif end_chr == "]" then										-- if it might be wiki-markup					if f.sub(str, -3, -1) == duplicate_char .. "]]" then		-- if last three chars of str are sepc]] wikilink 						trim = true;					elseif f.sub(str, -3, -1) == duplicate_char .. '"]' then	-- if last three chars of str are sepc"] quoted external link 						trim = true;					elseif  f.sub(str, -2, -1) == duplicate_char .. "]" then	-- if last two chars of str are sepc] external link						trim = true;					elseif f.sub(str, -4, -1) == duplicate_char .. "'']" then	-- normal case when |url=something & |title=Title.						trim = true;					end				elseif end_chr == " " then										-- if last char of output string is a space					if f.sub(str, -2, -1) == duplicate_char .. " " then			-- if last two chars of str are <sepc><space>						str = f.sub(str, 1, -3);								-- remove them both					end				end				if trim then					if value ~= comp then 										-- value does not equal comp when value contains HTML markup						local dup2 = duplicate_char;						if f.match(dup2, "%A" ) then dup2 = "%" .. dup2; end	-- if duplicate_char not a letter then escape it												value = f.gsub(value, "(%b<>)" .. dup2, "%1", 1 )		-- remove duplicate_char if it follows HTML markup					else						value = f.sub(value, 2, -1 );							-- remove duplicate_char when it is first character					end				end			end			str = str .. value; 												-- add it to the output string		end	end	return str;end--[[--------------------------< I S _ S U F F I X >-----------------------------returns true if suffix is properly formed Jr, Sr, or ordinal in the range 1–9.Puncutation not allowed.]]local function is_suffix (suffix)	if utilities.in_array (suffix, {'Jr', 'Sr', 'Jnr', 'Snr', '1st', '2nd', '3rd'}) or suffix:match ('^%dth$') then		return true;	end	return false;end--[[--------------------< I S _ G O O D _ V A N C _ N A M E >-------------------For Vancouver style, author/editor names are supposed to be rendered in Latin(read ASCII) characters.  When a name uses characters that contain diacriticalmarks, those characters are to be converted to the corresponding Latincharacter. When a name is written using a non-Latin alphabet or logogram, thatname is to be transliterated into Latin characters. The module doesn't do thisso editors may/must.This test allows |first= and |last= names to contain any of the letters definedin the four Unicode Latin character sets	[http://www.unicode.org/charts/PDF/U0000.pdf C0 Controls and Basic Latin] 0041–005A, 0061–007A	[http://www.unicode.org/charts/PDF/U0080.pdf C1 Controls and Latin-1 Supplement] 00C0–00D6, 00D8–00F6, 00F8–00FF	[http://www.unicode.org/charts/PDF/U0100.pdf Latin Extended-A] 0100–017F	[http://www.unicode.org/charts/PDF/U0180.pdf Latin Extended-B] 0180–01BF, 01C4–024F|lastn= also allowed to contain hyphens, spaces, and apostrophes.	(http://www.ncbi.nlm.nih.gov/books/NBK7271/box/A35029/)|firstn= also allowed to contain hyphens, spaces, apostrophes, and periodsThis original test:	if nil == mw.ustring.find (last, "^[A-Za-zÀ-ÖØ-öø-ƿDŽ-ɏ%-%s%']*$")	or nil == mw.ustring.find (first, "^[A-Za-zÀ-ÖØ-öø-ƿDŽ-ɏ%-%s%'%.]+[2-6%a]*$") thenwas written outside of the code editor and pasted here because the code editorgets confused between character insertion point and cursor position. The test hasbeen rewritten to use decimal character escape sequence for the individual bytesof the Unicode characters so that it is not necessary to use an external editorto maintain this code.	\195\128-\195\150 – À-Ö (U+00C0–U+00D6 – C0 controls)	\195\152-\195\182 – Ø-ö (U+00D8-U+00F6 – C0 controls)	\195\184-\198\191 – ø-ƿ (U+00F8-U+01BF – C0 controls, Latin extended A & B)	\199\132-\201\143 – DŽ-ɏ (U+01C4-U+024F – Latin extended B)]]local function is_good_vanc_name (last, first, suffix, position)	if not suffix then		if first:find ('[,%s]') then											-- when there is a space or comma, might be first name/initials + generational suffix			first = first:match ('(.-)[,%s]+');									-- get name/initials			suffix = first:match ('[,%s]+(.+)$');								-- get generational suffix		end	end	if utilities.is_set (suffix) then		if not is_suffix (suffix) then			add_vanc_error (cfg.err_msg_supl.suffix, position);			return false;														-- not a name with an appropriate suffix		end	end	if nil == mw.ustring.find (last, "^[A-Za-z\195\128-\195\150\195\152-\195\182\195\184-\198\191\199\132-\201\143\225\184\128-\225\187\191%-%s%']*$") or		nil == mw.ustring.find (first, "^[A-Za-z\195\128-\195\150\195\152-\195\182\195\184-\198\191\199\132-\201\143\225\184\128-\225\187\191%-%s%'%.]*$") then			add_vanc_error (cfg.err_msg_supl['non-Latin char'], position);			return false;														-- not a string of Latin characters; Vancouver requires Romanization	end;	return true;end--[[--------------------------< R E D U C E _ T O _ I N I T I A L S >------------------------------------------Attempts to convert names to initials in support of |name-list-style=vanc.  Names in |firstn= may be separated by spaces or hyphens, or for initials, a period.See http://www.ncbi.nlm.nih.gov/books/NBK7271/box/A35062/.Vancouver style requires family rank designations (Jr, II, III, etc.) to be renderedas Jr, 2nd, 3rd, etc.  See http://www.ncbi.nlm.nih.gov/books/NBK7271/box/A35085/.This code only accepts and understands generational suffix in the Vancouver formatbecause Roman numerals look like, and can be mistaken for, initials.This function uses ustring functions because firstname initials may be any of theUnicode Latin characters accepted by is_good_vanc_name ().]]local function reduce_to_initials (first, position)	if first:find (',', 1, true) then		return first;															-- commas not allowed; abandon	end	local name, suffix = mw.ustring.match (first, "^(%u+) ([%dJS][%drndth]+)$");	if not name then															-- if not initials and a suffix		name = mw.ustring.match (first, "^(%u+)$");								-- is it just initials?	end	if name then																-- if first is initials with or without suffix		if 3 > mw.ustring.len (name) then										-- if one or two initials			if suffix then														-- if there is a suffix				if is_suffix (suffix) then										-- is it legitimate?					return first;												-- one or two initials and a valid suffix so nothing to do				else					add_vanc_error (cfg.err_msg_supl.suffix, position);			-- one or two initials with invalid suffix so error message					return first;												-- and return first unmolested				end			else				return first;													-- one or two initials without suffix; nothing to do			end		end	end																			-- if here then name has 3 or more uppercase letters so treat them as a word	local initials_t, names_t = {}, {};											-- tables to hold name parts and initials	local i = 1;																-- counter for number of initials	names_t = mw.text.split (first, '[%s%-]+');									-- split into a sequence of names and possible suffix	while names_t[i] do															-- loop through the sequence		if 1 < i and names_t[i]:match ('[%dJS][%drndth]+%.?$') then				-- if not the first name, and looks like a suffix (may have trailing dot)			names_t[i] = names_t[i]:gsub ('%.', '');							-- remove terminal dot if present			if is_suffix (names_t[i]) then										-- if a legitimate suffix				table.insert (initials_t, ' ' .. names_t[i]);					-- add a separator space, insert at end of initials sequence				break;															-- and done because suffix must fall at the end of a name			end																	-- no error message if not a suffix; possibly because of Romanization		end		if 3 > i then			table.insert (initials_t, mw.ustring.sub (names_t[i], 1, 1));		-- insert the initial at end of initials sequence		end		i = i + 1;																-- bump the counter	end				return table.concat (initials_t);											-- Vancouver format does not include spaces.end--[[--------------------------< I N T E R W I K I _ P R E F I X E N _ G E T >----------------------------------extract interwiki prefixen from <value>.  Returns two one or two values:	false – no prefixen	nil – prefix exists but not recognized	project prefix, language prefix – when value has either of:		:<project>:<language>:<article>		:<language>:<project>:<article>	project prefix, nil – when <value> has only a known single-letter prefix	nil, language prefix – when <value> has only a known language prefixaccepts single-letter project prefixen: 'd' (wikidata), 's' (wikisource), and 'w' (wikipedia) prefixes; at thiswriting, the other single-letter prefixen (b (wikibook), c (commons), m (meta), n (wikinews), q (wikiquote), andv (wikiversity)) are not supported.]]local function interwiki_prefixen_get (value, is_link)	if not value:find (':%l+:') then											-- if no prefix		return false;															-- abandon; boolean here to distinguish from nil fail returns later	end	local prefix_patterns_linked_t = {											-- sequence of valid interwiki and inter project prefixen		'^%[%[:([dsw]):(%l%l+):',												-- wikilinked; project and language prefixes		'^%[%[:(%l%l+):([dsw]):',												-- wikilinked; language and project prefixes		'^%[%[:([dsw]):',														-- wikilinked; project prefix		'^%[%[:(%l%l+):',														-- wikilinked; language prefix		}			local prefix_patterns_unlinked_t = {										-- sequence of valid interwiki and inter project prefixen		'^:([dsw]):(%l%l+):',													-- project and language prefixes		'^:(%l%l+):([dsw]):',													-- language and project prefixes		'^:([dsw]):',															-- project prefix		'^:(%l%l+):',															-- language prefix		}		local cap1, cap2;	for _, pattern in ipairs ((is_link and prefix_patterns_linked_t) or prefix_patterns_unlinked_t) do		cap1, cap2 = value:match (pattern);		if cap1 then			break;																-- found a match so stop looking		end	end		if cap1 and cap2 then														-- when both then :project:language: or :language:project: (both forms allowed)		if 1 == #cap1 then														-- length == 1 then :project:language:			if cfg.inter_wiki_map[cap2] then									-- is language prefix in the interwiki map?				return cap1, cap2;												-- return interwiki project and interwiki language			end		else																	-- here when :language:project:			if cfg.inter_wiki_map[cap1] then									-- is language prefix in the interwiki map?				return cap2, cap1;												-- return interwiki project and interwiki language			end		end		return nil;																-- unknown interwiki language	elseif not (cap1 or cap2) then												-- both are nil?		return nil;																-- we got something that looks like a project prefix but isn't; return fail	elseif 1 == #cap1 then														-- here when one capture		return cap1, nil;														-- length is 1 so return project, nil language	else																		-- here when one capture and its length it more than 1		if cfg.inter_wiki_map[cap1] then										-- is language prefix in the interwiki map?			return nil, cap1;													-- return nil project, language		end	endend--[[--------------------------< L I S T _ P E O P L E >--------------------------Formats a list of people (authors, contributors, editors, interviewers, translators) names in the list will be linked when	|<name>-link= has a value	|<name>-mask- does NOT have a value; masked names are presumed to have been		rendered previously so should have been linked therewhen |<name>-mask=0, the associated name is not rendered]]local function list_people (control, people, etal)	local sep;	local namesep;	local format = control.format;	local maximum = control.maximum;	local name_list = {};	if 'vanc' == format then													-- Vancouver-like name styling?		sep = cfg.presentation['sep_nl_vanc'];									-- name-list separator between names is a comma		namesep = cfg.presentation['sep_name_vanc'];							-- last/first separator is a space	else		sep = cfg.presentation['sep_nl'];										-- name-list separator between names is a semicolon		namesep = cfg.presentation['sep_name'];									-- last/first separator is <comma><space>	end		if sep:sub (-1, -1) ~= " " then sep = sep .. " " end	if utilities.is_set (maximum) and maximum < 1 then return "", 0; end		-- returned 0 is for EditorCount; not used for other names		for i, person in ipairs (people) do		if utilities.is_set (person.last) then			local mask = person.mask;			local one;			local sep_one = sep;			if utilities.is_set (maximum) and i > maximum then				etal = true;				break;			end						if mask then				local n = tonumber (mask);										-- convert to a number if it can be converted; nil else				if n then					one = 0 ~= n and string.rep("&mdash;", n) or nil;			-- make a string of (n > 0) mdashes, nil else, to replace name					person.link = nil;											-- don't create link to name if name is replaces with mdash string or has been set nil				else					one = mask;													-- replace name with mask text (must include name-list separator)					sep_one = " ";												-- modify name-list separator				end			else				one = person.last;												-- get surname				local first = person.first										-- get given name				if utilities.is_set (first) then					if ("vanc" == format) then									-- if Vancouver format						one = one:gsub ('%.', '');								-- remove periods from surnames (http://www.ncbi.nlm.nih.gov/books/NBK7271/box/A35029/)						if not person.corporate and is_good_vanc_name (one, first, nil, i) then		-- and name is all Latin characters; corporate authors not tested							first = reduce_to_initials (first, i);				-- attempt to convert first name(s) to initials						end					end					one = one .. namesep .. first;				end			end			if utilities.is_set (person.link) then				one = utilities.make_wikilink (person.link, one);				-- link author/editor			end			if one then															-- if <one> has a value (name, mdash replacement, or mask text replacement)				local proj, tag = interwiki_prefixen_get (one, true);			-- get the interwiki prefixen if present				if 'w' == proj and ('Wikipedia' == mw.site.namespaces.Project['name']) then					proj = nil;													-- for stuff like :w:de:<article>, :w is unnecessary TODO: maint cat?				end				if proj then					local proj_name = ({['d'] = 'Wikidata', ['s'] = 'Wikisource', ['w'] = 'Wikipedia'})[proj];	-- :w (wikipedia) for linking from a non-wikipedia project					if proj_name then 						one = one .. utilities.wrap_style ('interproj', proj_name);	-- add resized leading space, brackets, static text, language name						utilities.add_prop_cat ('interproj-linked-name', proj);	-- categorize it; <proj> is sort key						tag = nil;												-- unset; don't do both project and language					end				end				if tag == cfg.this_wiki_code then					tag = nil;													-- stuff like :en:<article> at en.wiki is pointless TODO: maint cat?				end				if tag then					local lang = cfg.lang_tag_remap[tag] or cfg.mw_languages_by_tag_t[tag];					if lang then												-- error messaging done in extract_names() where we know parameter names						lang = mw.ustring.gsub(lang, "^[Tt]iếng ", "", 1);						one = one .. utilities.wrap_style ('interwiki', lang);	-- add resized leading space, brackets, static text, language name						utilities.add_prop_cat ('interwiki-linked-name', tag);	-- categorize it; <tag> is sort key					end				end				table.insert (name_list, one);									-- add it to the list of names				table.insert (name_list, sep_one);								-- add the proper name-list separator			end		end	end	local count = #name_list / 2;												-- (number of names + number of separators) divided by 2	if 0 < count then 		if 1 < count and not etal then			if 'amp' == format then				name_list[#name_list-2] = " & ";								-- replace last separator with ampersand text			elseif 'and' == format then				if 2 == count then					name_list[#name_list-2] = cfg.presentation.sep_nl_and;		-- replace last separator with 'and' text				else					name_list[#name_list-2] = cfg.presentation.sep_nl_end;		-- replace last separator with '(sep) and' text				end			end		end		name_list[#name_list] = nil;											-- erase the last separator	end	local result = table.concat (name_list);									-- construct list	if etal and utilities.is_set (result) then									-- etal may be set by |display-authors=etal but we might not have a last-first list		result = result .. sep .. cfg.messages['et al'];						-- we've got a last-first list and etal so add et al.	end		return result, count;														-- return name-list string and count of number of names (count used for editor names only)end--[[--------------------< M A K E _ C I T E R E F _ I D >-----------------------Generates a CITEREF anchor ID if we have at least one name or a date.  Otherwisereturns an empty string.namelist is one of the contributor-, author-, or editor-name lists chosen in thatorder.  year is Year or anchor_year.]]local function make_citeref_id (namelist, year)	local names={};							-- a table for the one to four names and year	for i,v in ipairs (namelist) do			-- loop through the list and take up to the first four last names		names[i] = v.last		if i == 4 then break end			-- if four then done	end	table.insert (names, year);				-- add the year at the end	local id = table.concat(names);			-- concatenate names and year for CITEREF id	if utilities.is_set (id) then			-- if concatenation is not an empty string		return "CITEREF" .. id;				-- add the CITEREF portion	else		return '';							-- return an empty string; no reason to include CITEREF id in this citation	endend--[[--------------------------< C I T E _ C L A S S _A T T R I B U T E _M A K E >------------------------------construct <cite> tag class attribute for this citation.<cite_class> – config.CitationClass from calling template<mode> – value from |mode= parameter]]local function cite_class_attribute_make (cite_class, mode)	local class_t = {};	table.insert (class_t, 'citation');											-- required for blue highlight	if 'citation' ~= cite_class then		table.insert (class_t, cite_class);										-- identify this template for user css		table.insert (class_t, utilities.is_set (mode) and mode or 'cs1');		-- identify the citation style for user css or javascript	else		table.insert (class_t, utilities.is_set (mode) and mode or 'cs2');		-- identify the citation style for user css or javascript	end	for _, prop_key in ipairs (z.prop_keys_t) do		table.insert (class_t, prop_key);										-- identify various properties for user css or javascript	end	return table.concat (class_t, ' ');											-- make a big string and doneend--[[---------------------< N A M E _ H A S _ E T A L >--------------------------Evaluates the content of name parameters (author, editor, etc.) for variations onthe theme of et al.  If found, the et al. is removed, a flag is set to true andthe function returns the modified name and the flag.This function never sets the flag to false but returns its previous state becauseit may have been set by previous passes through this function or by the associated|display-<names>=etal parameter]]local function name_has_etal (name, etal, nocat, param)	if utilities.is_set (name) then												-- name can be nil in which case just return		local patterns = cfg.et_al_patterns; 									-- get patterns from configuration				for _, pattern in ipairs (patterns) do									-- loop through all of the patterns			if name:match (pattern) then										-- if this 'et al' pattern is found in name				name = name:gsub (pattern, '');									-- remove the offending text				etal = true;													-- set flag (may have been set previously here or by |display-<names>=etal)				if not nocat then												-- no categorization for |vauthors=					utilities.set_message ('err_etal', {param});				-- and set an error if not added				end			end		end	end	return name, etal;end--[[---------------------< N A M E _ I S _ N U M E R I C >----------------------Add an error message and category when <name> parameter value does not contain letters.  Add a maintenance category when <name> parameter value has numeric characters mixed with characters that are not numeric characters; could be letters and/or punctuation characters.This function will only emit one error and one maint message for the current template.  Does not emit both errorand maint messages/categories for the same parameter value.returns nothing]]local function name_is_numeric (name, name_alias, list_name)	local patterns = {		'^%D+%d',																-- <name> must have digits preceded by other characters		'^%D*%d+%D+',															-- <name> must have digits followed by other characters		}	if not added_numeric_name_errs and mw.ustring.match (name, '^[%A]+$') then	-- if we have not already set an error message and <name> does not have any alpha characters		utilities.set_message ('err_numeric_names', name_alias);				-- add an error message		added_numeric_name_errs = true;											-- set the flag so we emit only one error message		return;																	-- when here no point in further testing; abandon	end	if not added_numeric_name_maint then										-- if we have already set a maint message		for _, pattern in ipairs (patterns) do									-- spin through list of patterns			if mw.ustring.match (name, pattern) then							-- digits preceded or followed by anything but digits; %D+ includes punctuation				utilities.set_message ('maint_numeric_names', cfg.special_case_translation [list_name]);	-- add a maint cat for this template				added_numeric_name_maint = true;								-- set the flag so we emit only one maint message				return;															-- when here no point in further testing; abandon			end		end	endend--[[-----------------< N A M E _ H A S _ M U L T _ N A M E S >------------------Evaluates the content of last/surname (authors etc.) parameters for multiple names.Multiple names are indicated if there is more than one comma or any "unescaped"semicolons. Escaped semicolons are ones used as part of selected HTML entities.If the condition is met, the function adds the multiple name maintenance category.Same test for first except that commas should not appear in given names (MOS:JR saysthat the generational suffix does not take a separator character).  Titles, degrees,postnominals, affiliations, all normally comma separated don't belong in a citation.<name> – name parameter value<list_name> – AuthorList, EditorList, etc<limit> – number of allowed commas; 1 (default) for surnames; 0 for given namesreturns nothing]]local function name_has_mult_names (name, list_name, limit)	local _, commas, semicolons, nbsps;	limit = limit and limit or 1;	if utilities.is_set (name) then		_, commas = name:gsub (',', '');										-- count the number of commas		_, semicolons = name:gsub (';', '');									-- count the number of semicolons		-- nbsps probably should be its own separate count rather than merged in		-- some way with semicolons because Lua patterns do not support the		-- grouping operator that regex does, which means there is no way to add		-- more entities to escape except by adding more counts with the new		-- entities		_, nbsps = name:gsub ('&nbsp;','');										-- count nbsps				-- There is exactly 1 semicolon per &nbsp; entity, so subtract nbsps		-- from semicolons to 'escape' them. If additional entities are added,		-- they also can be subtracted.		if limit < commas or 0 < (semicolons - nbsps) then			utilities.set_message ('maint_mult_names', cfg.special_case_translation [list_name]);	-- add a maint message		end	endend--[=[-------------------------< I S _ G E N E R I C >----------------------------------------------------------Compares values assigned to various parameters according to the string provided as <item> in the function call.<item> can have on of two values:	'generic_names' – for name-holding parameters: |last=, |first=, |editor-last=, etc	'generic_titles' – for |title=There are two types of generic tests.  The 'accept' tests look for a pattern that should not be rejected by the'reject' test.  For example,	|author=[[John Smith (author)|Smith, John]]would be rejected by the 'author' reject test.  But piped wikilinks with 'author' disambiguation should not berejected so the 'accept' test prevents that from happening.  Accept tests are always performed before rejecttests.Each of the 'accept' and 'reject' sequence tables hold tables for en.wiki (['en']) and local.wiki (['local'])that each can hold a test sequence table  The sequence table holds, at index [1], a test pattern, and, at index[2], a boolean control value.  The control value tells string.find() or mw.ustring.find() to do plain-text search (true)or a pattern search (false).  The intent of all this complexity is to make these searches as fast as possible sothat we don't run out of processing time on very large articles.Returns	true when a reject test finds the pattern or string	false when an accept test finds the pattern or string	nil else]=]local function is_generic (item, value, wiki)	local test_val;	local str_lower = {															-- use string.lower() for en.wiki (['en']) and use mw.ustring.lower() or local.wiki (['local'])		['en'] = string.lower,		['local'] = mw.ustring.lower,		}	local str_find = {															-- use string.find() for en.wiki (['en']) and use mw.ustring.find() or local.wiki (['local'])		['en'] = string.find,		['local'] = mw.ustring.find,		}	local function test (val, test_t, wiki)										-- local function to do the testing; <wiki> selects lower() and find() functions		val = test_t[2] and str_lower[wiki](value) or val;						-- when <test_t[2]> set to 'true', plaintext search using lowercase value		return str_find[wiki] (val, test_t[1], 1, test_t[2]);					-- return nil when not found or matched	end			local test_types_t = {'accept', 'reject'};									-- test accept patterns first, then reject patterns	local wikis_t = {'en', 'local'};											-- do tests for each of these keys; en.wiki first, local.wiki second	for _, test_type in ipairs (test_types_t) do								-- for each test type		for _, generic_value in pairs (cfg.special_case_translation[item][test_type]) do	-- spin through the list of generic value fragments to accept or reject			for _, wiki in ipairs (wikis_t) do				if generic_value[wiki] then					if test (value, generic_value[wiki], wiki) then				-- go do the test						return ('reject' == test_type);							-- param value rejected, return true; false else					end				end			end		end	endend--[[--------------------------< N A M E _ I S _ G E N E R I C >------------------------------------------------calls is_generic() to determine if <name> is a 'generic name' listed in cfg.generic_names; <name_alias> is theparameter name used in error messaging]]local function name_is_generic (name, name_alias)	if not added_generic_name_errs  and is_generic ('generic_names', name) then		utilities.set_message ('err_generic_name', name_alias);					-- set an error message		added_generic_name_errs = true;	endend--[[--------------------------< N A M E _ C H E C K S >--------------------------------------------------------This function calls various name checking functions used to validate the content of the various name-holding parameters.]]local function name_checks (last, first, list_name, last_alias, first_alias)	local accept_name;	if utilities.is_set (last) then		last, accept_name = utilities.has_accept_as_written (last);				-- remove accept-this-as-written markup when it wraps all of <last>		if not accept_name then													-- <last> not wrapped in accept-as-written markup			name_has_mult_names (last, list_name);								-- check for multiple names in the parameter			name_is_numeric (last, last_alias, list_name);						-- check for names that have no letters or are a mix of digits and other characters			name_is_generic (last, last_alias);									-- check for names found in the generic names list		end	end	if utilities.is_set (first) then		first, accept_name = utilities.has_accept_as_written (first);			-- remove accept-this-as-written markup when it wraps all of <first>		if not accept_name then													-- <first> not wrapped in accept-as-written markup			name_has_mult_names (first, list_name, 0);							-- check for multiple names in the parameter; 0 is number of allowed commas in a given name			name_is_numeric (first, first_alias, list_name);					-- check for names that have no letters or are a mix of digits and other characters			name_is_generic (first, first_alias);								-- check for names found in the generic names list		end		local wl_type, D = utilities.is_wikilink (first);		if 0 ~= wl_type then			first = D;			utilities.set_message ('err_bad_paramlink', first_alias);		end	end	return last, first;															-- doneend--[[----------------------< E X T R A C T _ N A M E S >-------------------------Gets name list from the input argumentsSearches through args in sequential order to find |lastn= and |firstn= parameters(or their aliases), and their matching link and mask parameters. Stops searchingwhen both |lastn= and |firstn= are not found in args after two sequential attempts:found |last1=, |last2=, and |last3= but doesn't find |last4= and |last5= then thesearch is done.This function emits an error message when there is a |firstn= without a matching|lastn=.  When there are 'holes' in the list of last names, |last1= and |last3=are present but |last2= is missing, an error message is emitted. |lastn= is notrequired to have a matching |firstn=.When an author or editor parameter contains some form of 'et al.', the 'et al.'is stripped from the parameter and a flag (etal) returned that will cause list_people()to add the static 'et al.' text from Module:Citation/CS1/Configuration.  This keeps'et al.' out of the template's metadata.  When this occurs, an error is emitted.]]local function extract_names(args, list_name)	local names = {};															-- table of names	local last;																	-- individual name components	local first;	local link;	local mask;	local i = 1;																-- loop counter/indexer	local n = 1;																-- output table indexer	local count = 0;															-- used to count the number of times we haven't found a |last= (or alias for authors, |editor-last or alias for editors)	local etal = false;															-- return value set to true when we find some form of et al. in an author parameter	local last_alias, first_alias, link_alias;									-- selected parameter aliases used in error messaging	while true do		last, last_alias = utilities.select_one ( args, cfg.aliases[list_name .. '-Last'], 'err_redundant_parameters', i );		-- search through args for name components beginning at 1		first, first_alias = utilities.select_one ( args, cfg.aliases[list_name .. '-First'], 'err_redundant_parameters', i );		link, link_alias = utilities.select_one ( args, cfg.aliases[list_name .. '-Link'], 'err_redundant_parameters', i );		mask = utilities.select_one ( args, cfg.aliases[list_name .. '-Mask'], 'err_redundant_parameters', i );			if last then															-- error check |lastn= alias for unknown interwiki link prefix; done here because this is where we have the parameter name			local project, language = interwiki_prefixen_get (last, true);		-- true because we expect interwiki links in |lastn= to be wikilinked			if nil == project and nil == language then							-- when both are nil				utilities.set_message ('err_bad_paramlink', last_alias);		-- not known, emit an error message	-- TODO: err_bad_interwiki?				last = utilities.remove_wiki_link (last);						-- remove wikilink markup; show display value only			end		end				if link then															-- error check |linkn= alias for unknown interwiki link prefix			local project, language = interwiki_prefixen_get (link, false);		-- false because wiki links in |author-linkn= is an error			if nil == project and nil == language then							-- when both are nil				utilities.set_message ('err_bad_paramlink', link_alias);		-- not known, emit an error message	-- TODO: err_bad_interwiki?				link = nil;														-- unset so we don't link				link_alias = nil;			end		end				last, etal = name_has_etal (last, etal, false, last_alias);				-- find and remove variations on et al.		first, etal = name_has_etal (first, etal, false, first_alias);			-- find and remove variations on et al.		last, first = name_checks (last, first, list_name, last_alias, first_alias);						-- multiple names, extraneous annotation, etc. checks		if first and not last then												-- if there is a firstn without a matching lastn			local alias = first_alias:find ('given', 1, true) and 'given' or 'first';	-- get first or given form of the alias			utilities.set_message ('err_first_missing_last', {				first_alias,													-- param name of alias missing its mate				first_alias:gsub (alias, {['first'] = 'last', ['given'] = 'surname'}),	-- make param name appropriate to the alias form				});																-- add this error message		elseif not first and not last then										-- if both firstn and lastn aren't found, are we done?			count = count + 1;													-- number of times we haven't found last and first			if 2 <= count then													-- two missing names and we give up				break;															-- normal exit or there is a two-name hole in the list; can't tell which			end		else																	-- we have last with or without a first			local result;			link = link_title_ok (link, link_alias, last, last_alias);			-- check for improper wiki-markup			if first then				link = link_title_ok (link, link_alias, first, first_alias);	-- check for improper wiki-markup			end			names[n] = {last = last, first = first, link = link, mask = mask, corporate = false};	-- add this name to our names list (corporate for |vauthors= only)			n = n + 1;															-- point to next location in the names table			if 1 == count then													-- if the previous name was missing				utilities.set_message ('err_missing_name', {list_name:match ("(%w+)List"):lower(), i - 1});	-- add this error message			end			count = 0;															-- reset the counter, we're looking for two consecutive missing names		end		i = i + 1;																-- point to next args location	end		return names, etal;															-- all done, return our list of names and the etal flagend--[[--------------------------< N A M E _ T A G _ G E T >------------------------------------------------------attempt to decode |language=<lang_param> and return language name and matching tag; nil else.This function looks for:	<lang_param> as a tag in cfg.lang_tag_remap{}	<lang_param> as a name in cfg.lang_name_remap{}		<lang_param> as a name in cfg.mw_languages_by_name_t	<lang_param> as a tag in cfg.mw_languages_by_tag_twhen those fail, presume that <lang_param> is an IETF-like tag that MediaWiki does not recognize.  Strip allscript, region, variant, whatever subtags from <lang_param> to leave just a two or three character language tagand look for the new <lang_param> in cfg.mw_languages_by_tag_t{}on success, returns name (in properly capitalized form) and matching tag (in lowercase); on failure returns nil]]local function name_tag_get (lang_param)	local lang_param_lc = mw.ustring.lower (lang_param);						-- use lowercase as an index into the various tables	local name;	local tag;	name = cfg.lang_tag_remap[lang_param_lc];									-- assume <lang_param_lc> is a tag; attempt to get remapped language name 	if name then																-- when <name>, <lang_param> is a tag for a remapped language name		if cfg.lang_name_remap[name:lower()][2] ~= lang_param_lc then			utilities.set_message ('maint_unknown_lang');						-- add maint category if not already added			return name, cfg.lang_name_remap[name:lower()][2];					-- so return name and tag from lang_name_remap[name]; special case to xlate sr-ec and sr-el to sr-cyrl and sr-latn		end		return name, lang_param_lc;												-- so return <name> from remap and <lang_param_lc>	end	tag = lang_param_lc:match ('^(%a%a%a?)%-.*');								-- still assuming that <lang_param_lc> is a tag; strip script, region, variant subtags	name = cfg.lang_tag_remap[tag];												-- attempt to get remapped language name with language subtag only	if name then																-- when <name>, <tag> is a tag for a remapped language name		return name, tag;														-- so return <name> from remap and <tag>	end	if cfg.lang_name_remap[lang_param_lc] then									-- not a remapped tag, assume <lang_param_lc> is a name; attempt to get remapped language tag 		return cfg.lang_name_remap[lang_param_lc][1], cfg.lang_name_remap[lang_param_lc][2];	-- for this <lang_param_lc>, return a (possibly) new name and appropriate tag	end	name = cfg.mw_languages_by_tag_t[lang_param_lc];							-- assume that <lang_param_lc> is a tag; attempt to get its matching language name		if name then		return name, lang_param_lc;												-- <lang_param_lc> is a tag so return it and <name>	end		tag = cfg.mw_languages_by_name_t[lang_param_lc];							-- assume that <lang_param_lc> is a language name; attempt to get its matching tag		if tag then		return cfg.mw_languages_by_tag_t[tag], tag;								-- <lang_param_lc> is a name so return the name from the table and <tag>	end	tag = lang_param_lc:match ('^(%a%a%a?)%-.*');								-- is <lang_param_lc> an IETF-like tag that MediaWiki doesn't recognize? <tag> gets the language subtag; nil else	if tag then		name = cfg.mw_languages_by_tag_t[tag];									-- attempt to get a language name using the shortened <tag>		if name then			return name, tag;													-- <lang_param_lc> is an unrecognized IETF-like tag so return <name> and language subtag		end	endend--[[-------------------< L A N G U A G E _ P A R A M E T E R >------------------Gets language name from a provided two- or three-character ISO 639 code.  If a codeis recognized by MediaWiki, use the returned name; if not, then use the value thatwas provided with the language parameter.When |language= contains a recognized language (either code or name), the page isassigned to the category for that code: Category:Norwegian-language sources (no).For valid three-character code languages, the page is assigned to the single categoryfor '639-2' codes: Category:CS1 ISO 639-2 language sources.Languages that are the same as the local wiki are not categorized.  MediaWiki doesnot recognize three-character equivalents of two-character codes: code 'ar' isrecognized but code 'ara' is not.This function supports multiple languages in the form |language=nb, French, thwhere the language names or codes are separated from each other by commas withoptional space characters.]]local function language_parameter (lang)	local tag;																	-- some form of IETF-like language tag; language subtag with optional region, sript, vatiant, etc subtags	local lang_subtag;															-- ve populates |language= with mostly unecessary region subtags the MediaWiki does not recognize; this is the base language subtag	local name;																	-- the language name	local language_list = {};													-- table of language names to be rendered	local names_t = {};															-- table made from the value assigned to |language=	local this_wiki_name = mw.language.fetchLanguageName (cfg.this_wiki_code, cfg.this_wiki_code);	-- get this wiki's language name	names_t = mw.text.split (lang, '%s*,%s*');									-- names should be a comma separated list	for _, lang in ipairs (names_t) do											-- reuse lang here because we don't yet know if lang is a language name or a language tag		name, tag = name_tag_get (lang);										-- attempt to get name/tag pair for <lang>; <name> has proper capitalization; <tag> is lowercase		if utilities.is_set (tag) then			lang_subtag = tag:gsub ('^(%a%a%a?)%-.*', '%1');					-- for categorization, strip any IETF-like tags from language tag			name = mw.ustring.gsub(name, "^[Tt]iếng ", "", 1)			if cfg.this_wiki_code ~= lang_subtag then							-- when the language is not the same as this wiki's language				if 2 == lang_subtag:len() then									-- and is a two-character tag					utilities.add_prop_cat ('foreign-lang-source', {name, tag}, lang_subtag);		-- categorize it; tag appended to allow for multiple language categorization				else															-- or is a recognized language (but has a three-character tag)					utilities.add_prop_cat ('foreign-lang-source-2', {lang_subtag}, lang_subtag);			-- categorize it differently TODO: support multiple three-character tag categories per cs1|2 template?				end			elseif cfg.local_lang_cat_enable then								-- when the language and this wiki's language are the same and categorization is enabled				utilities.add_prop_cat ('local-lang-source', {name, lang_subtag});		-- categorize it			end		else			name = lang;														-- return whatever <lang> has so that we show something			utilities.set_message ('maint_unknown_lang');						-- add maint category if not already added		end				table.insert (language_list, name);		name = '';																-- so we can reuse it	end 	name = utilities.make_sep_list (#language_list, language_list);	if (1 == #language_list) and (lang_subtag == cfg.this_wiki_code) then		-- when only one language, find lang name in this wiki lang name; for |language=en-us, 'English' in 'American English'		return '';																-- if one language and that language is this wiki's return an empty string (no annotation)	end	return (" " .. wrap_msg ('language', name));								-- otherwise wrap with '(in ...)'	--[[ TODO: should only return blank or name rather than full list	so we can clean up the bunched parenthetical elements Language, Type, Format	]]end--[[-----------------------< S E T _ C S _ S T Y L E >--------------------------Gets the default CS style configuration for the given mode.Returns default separator and either postscript as passed in or the default.In CS1, the default postscript and separator are '.'.In CS2, the default postscript is the empty string and the default separator is ','.]]local function set_cs_style (postscript, mode)	if utilities.is_set(postscript) then		-- emit a maintenance message if user postscript is the default cs1 postscript		-- we catch the opposite case for cs2 in set_style		if mode == 'cs1' and postscript == cfg.presentation['ps_' .. mode] then			utilities.set_message ('maint_postscript');		end	else		postscript = cfg.presentation['ps_' .. mode];	end	return cfg.presentation['sep_' .. mode], postscript;end--[[--------------------------< S E T _ S T Y L E >-----------------------------Sets the separator and postscript styles. Checks the |mode= first and the#invoke CitationClass second. Removes the postscript if postscript == none.]]local function set_style (mode, postscript, cite_class)	local sep;	if 'cs2' == mode then		sep, postscript = set_cs_style (postscript, 'cs2');	elseif 'cs1' == mode then		sep, postscript = set_cs_style (postscript, 'cs1');	elseif 'citation' == cite_class	then		sep, postscript = set_cs_style (postscript, 'cs2');	else		sep, postscript = set_cs_style (postscript, 'cs1');	end	if cfg.keywords_xlate[postscript:lower()] == 'none' then		-- emit a maintenance message if user postscript is the default cs2 postscript		-- we catch the opposite case for cs1 in set_cs_style		if 'cs2' == mode or ('cs1' ~= mode and 'citation' == cite_class) then	-- {{citation |title=Title |mode=cs1 |postscript=none}} should not emit maint message			utilities.set_message ('maint_postscript');		end		postscript = '';	end		return sep, postscriptend--[=[-------------------------< I S _ P D F >-----------------------------------Determines if a URL has the file extension that is one of the PDF file extensionsused by [[MediaWiki:Common.css]] when applying the PDF icon to external links.returns true if file extension is one of the recognized extensions, else false]=]local function is_pdf (url)	return url:match ('%.pdf$') or url:match ('%.PDF$') or		url:match ('%.pdf[%?#]') or url:match ('%.PDF[%?#]') or		url:match ('%.PDF&#035') or url:match ('%.pdf&#035');end--[[--------------------------< S T Y L E _ F O R M A T >-----------------------Applies CSS style to |format=, |chapter-format=, etc.  Also emits an error messageif the format parameter does not have a matching URL parameter.  If the format parameteris not set and the URL contains a file extension that is recognized as a PDF documentby MediaWiki's commons.css, this code will set the format parameter to (PDF) withthe appropriate styling.]]local function style_format (format, url, fmt_param, url_param)	if utilities.is_set (format) then		format = utilities.wrap_style ('format', format);						-- add leading space, parentheses, resize		if not utilities.is_set (url) then			utilities.set_message ('err_format_missing_url', {fmt_param, url_param});	-- add an error message		end	elseif is_pdf (url) then													-- format is not set so if URL is a PDF file then		format = utilities.wrap_style ('format', 'PDF');						-- set format to PDF	else		format = '';															-- empty string for concatenation	end	return format;end--[[---------------------< G E T _ D I S P L A Y _ N A M E S >------------------Returns a number that defines the number of names displayed for author and editorname lists and a Boolean flag to indicate when et al. should be appended to the name list.When the value assigned to |display-xxxxors= is a number greater than or equal to zero,return the number and the previous state of the 'etal' flag (false by defaultbut may have been set to true if the name list contains some variant of the text 'et al.').When the value assigned to |display-xxxxors= is the keyword 'etal', return a numberthat is one greater than the number of authors in the list and set the 'etal' flag true.This will cause the list_people() to display all of the names in the name list followed by 'et al.'In all other cases, returns nil and the previous state of the 'etal' flag.inputs:	max: A['DisplayAuthors'] or A['DisplayEditors'], etc; a number or some flavor of etal	count: #a or #e	list_name: 'authors' or 'editors'	etal: author_etal or editor_etalThis function sets an error message when |display-xxxxors= value greater than or equal to number of names butnot when <max> comes from {{cs1 config}} global settings.  When using global settings, <param> is set to thekeyword 'cs1 config' which is used to supress the normal error.  Error is suppressed because it is to be expectedthat some citations in an article will have the same or fewer names that the limit specified in {{cs1 config}}.]]local function get_display_names (max, count, list_name, etal, param)	if utilities.is_set (max) then		if 'etal' == max:lower():gsub("[ '%.]", '') then						-- the :gsub() portion makes 'etal' from a variety of 'et al.' spellings and stylings			max = count + 1;													-- number of authors + 1 so display all author name plus et al.			etal = true;														-- overrides value set by extract_names()		elseif max:match ('^%d+$') then											-- if is a string of numbers			max = tonumber (max);												-- make it a number			if (max >= count) and ('cs1 config' ~= param) then					-- error when local |display-xxxxors= value greater than or equal to number of names; not an error when using global setting				utilities.set_message ('err_disp_name', {param, max});			-- add error message				max = nil;			end		else																	-- not a valid keyword or number			utilities.set_message ('err_disp_name', {param, max});				-- add error message			max = nil;															-- unset; as if |display-xxxxors= had not been set		end	end		return max, etal;end--[[----------< E X T R A _ T E X T _ I N _ P A G E _ C H E C K >---------------Adds error if |page=, |pages=, |quote-page=, |quote-pages= has what appears to besome form of p. or pp. abbreviation in the first characters of the parameter content.check page for extraneous p, p., pp, pp., pg, pg. at start of parameter value:	good pattern: '^P[^%.P%l]' matches when page begins PX or P# but not Px		      where x and X are letters and # is a digit	bad pattern:  '^[Pp][PpGg]' matches when page begins pp, pP, Pp, PP, pg, pG, Pg, PG]]local function extra_text_in_page_check (val, name)	if not val:match (cfg.vol_iss_pg_patterns.good_ppattern) then		for _, pattern in ipairs (cfg.vol_iss_pg_patterns.bad_ppatterns) do		-- spin through the selected sequence table of patterns			if val:match (pattern) then											-- when a match, error so				utilities.set_message ('err_extra_text_pages', name);	 		-- add error message				return;															-- and done			end		end	end		end--[[--------------------------< E X T R A _ T E X T _ I N _ V O L _ I S S _ C H E C K >------------------------Adds error if |volume= or |issue= has what appears to be some form of redundant 'type' indicator.  Applies toboth; this function looks for issue text in both |issue= and |volume= and looks for volume-like text in |voluem=and |issue=.For |volume=:	'V.', or 'Vol.' (with or without the dot) abbreviations or 'Volume' in the first characters of the parameter	content (all case insensitive). 'V' and 'v' (without the dot) are presumed to be roman numerals so	are allowed.For |issue=:	'No.', 'I.', 'Iss.' (with or without the dot) abbreviations, or 'Issue' in the first characters of the	parameter content (all case insensitive); numero styling: 'n°' with degree sign U+00B0, and № precomposed	numero sign U+2116.	Single character values ('v', 'i', 'n') allowed when not followed by separator character ('.', ':', '=', orwhitespace character) – param values are trimmed of whitespace by MediaWiki before delivered to the module.	<val> is |volume= or |issue= parameter value<name> is |volume= or |issue= parameter name for error message<selector> is 'v' for |volume=, 'i' for |issue=sets error message on failure; returns nothing]]local function extra_text_in_vol_iss_check (val, name, selector)	if not utilities.is_set (val) then		return;	end		local handler = 'v' == selector and 'err_extra_text_volume' or 'err_extra_text_issue';	val = val:lower();															-- force parameter value to lower case	for _, pattern in ipairs (cfg.vol_iss_pg_patterns.vi_patterns_t) do			-- spin through the sequence table of patterns		if val:match (pattern) then												-- when a match, error so			utilities.set_message (handler, name);								-- add error message			return;																-- and done		end	endend--[=[-------------------------< G E T _ V _ N A M E _ T A B L E >----------------------------------------------split apart a |vauthors= or |veditors= parameter.  This function allows for corporate names, wrapped in doubledparentheses to also have commas; in the old version of the code, the doubled parentheses were included in therendered citation and in the metadata.  Individual author names may be wikilinked	|vauthors=Jones AB, [[E. B. White|White EB]], ((Black, Brown, and Co.))]=]local function get_v_name_table (vparam, output_table, output_link_table)	local _, accept = utilities.has_accept_as_written (vparam);	if accept then		utilities.add_prop_cat ('vanc-accept');									-- add properties category	end	local name_table = mw.text.split(vparam, "%s*,%s*");						-- names are separated by commas	local wl_type, label, link;													-- wl_type not used here; just a placeholder		local i = 1;		while name_table[i] do		if name_table[i]:match ('^%(%(.*[^%)][^%)]$') then						-- first segment of corporate with one or more commas; this segment has the opening doubled parentheses			local name = name_table[i];			i = i + 1;															-- bump indexer to next segment			while name_table[i] do				name = name .. ', ' .. name_table[i];							-- concatenate with previous segments				if name_table[i]:match ('^.*%)%)$') then						-- if this table member has the closing doubled parentheses					break;														-- and done reassembling so				end				i = i + 1;														-- bump indexer			end			table.insert (output_table, name);									-- and add corporate name to the output table			table.insert (output_link_table, '');								-- no wikilink		else			wl_type, label, link = utilities.is_wikilink (name_table[i]);		-- wl_type is: 0, no wl (text in label variable); 1, [[D]]; 2, [[L|D]]			table.insert (output_table, label);									-- add this name			if 1 == wl_type then				table.insert (output_link_table, label);						-- simple wikilink [[D]]			else				table.insert (output_link_table, link);							-- no wikilink or [[L|D]]; add this link if there is one, else empty string			end		end		i = i + 1;	end		return output_table;end--[[--------------------------< P A R S E _ V A U T H O R S _ V E D I T O R S >--------------------------------This function extracts author / editor names from |vauthors= or |veditors= and finds matching |xxxxor-maskn= and|xxxxor-linkn= in args.  It then returns a table of assembled names just as extract_names() does.Author / editor names in |vauthors= or |veditors= must be in Vancouver system style. Corporate or institutional namesmay sometimes be required and because such names will often fail the is_good_vanc_name() and other format compliancetests, are wrapped in doubled parentheses ((corporate name)) to suppress the format tests.Supports generational suffixes Jr, 2nd, 3rd, 4th–6th.This function sets the Vancouver error when a required comma is missing and when there is a space between an author's initials.]]local function parse_vauthors_veditors (args, vparam, list_name)	local names = {};															-- table of names assembled from |vauthors=, |author-maskn=, |author-linkn=	local v_name_table = {};	local v_link_table = {};													-- when name is wikilinked, targets go in this table	local etal = false;															-- return value set to true when we find some form of et al. vauthors parameter	local last, first, link, mask, suffix;	local corporate = false;	vparam, etal = name_has_etal (vparam, etal, true);							-- find and remove variations on et al. do not categorize (do it here because et al. might have a period)	v_name_table = get_v_name_table (vparam, v_name_table, v_link_table);		-- names are separated by commas	for i, v_name in ipairs(v_name_table) do		first = '';																-- set to empty string for concatenation and because it may have been set for previous author/editor		local accept_name;		v_name, accept_name = utilities.has_accept_as_written (v_name);			-- remove accept-this-as-written markup when it wraps all of <v_name>		if accept_name then			last = v_name;			corporate = true;													-- flag used in list_people()		elseif string.find(v_name, "%s") then			if v_name:find('[;%.]') then										-- look for commonly occurring punctuation characters; 				add_vanc_error (cfg.err_msg_supl.punctuation, i);			end			local lastfirstTable = {}			lastfirstTable = mw.text.split(v_name, "%s+")			first = table.remove(lastfirstTable);								-- removes and returns value of last element in table which should be initials or generational suffix			if not mw.ustring.match (first, '^%u+$') then						-- mw.ustring here so that later we will catch non-Latin characters				suffix = first;													-- not initials so assume that whatever we got is a generational suffix				first = table.remove(lastfirstTable);							-- get what should be the initials from the table			end			last = table.concat(lastfirstTable, ' ')							-- returns a string that is the concatenation of all other names that are not initials and generational suffix			if not utilities.is_set (last) then				first = '';														-- unset				last = v_name;													-- last empty because something wrong with first				add_vanc_error (cfg.err_msg_supl.name, i);			end			if mw.ustring.match (last, '%a+%s+%u+%s+%a+') then				add_vanc_error (cfg.err_msg_supl['missing comma'], i);			-- matches last II last; the case when a comma is missing			end			if mw.ustring.match (v_name, ' %u %u$') then						-- this test is in the wrong place TODO: move or replace with a more appropriate test				add_vanc_error (cfg.err_msg_supl.initials, i);					-- matches a space between two initials			end		else			last = v_name;														-- last name or single corporate name?  Doesn't support multiword corporate names? do we need this?		end				if utilities.is_set (first) then			if not mw.ustring.match (first, "^%u?%u$") then						-- first shall contain one or two upper-case letters, nothing else				add_vanc_error (cfg.err_msg_supl.initials, i);					-- too many initials; mixed case initials (which may be ok Romanization); hyphenated initials			end			is_good_vanc_name (last, first, suffix, i);							-- check first and last before restoring the suffix which may have a non-Latin digit			if utilities.is_set (suffix) then				first = first .. ' ' .. suffix;									-- if there was a suffix concatenate with the initials				suffix = '';													-- unset so we don't add this suffix to all subsequent names			end		else			if not corporate then				is_good_vanc_name (last, '', nil, i);			end		end		link = utilities.select_one ( args, cfg.aliases[list_name .. '-Link'], 'err_redundant_parameters', i ) or v_link_table[i];		mask = utilities.select_one ( args, cfg.aliases[list_name .. '-Mask'], 'err_redundant_parameters', i );		names[i] = {last = last, first = first, link = link, mask = mask, corporate = corporate};		-- add this assembled name to our names list	end	return names, etal;															-- all done, return our list of namesend--[[--------------------------< S E L E C T _ A U T H O R _ E D I T O R _ S O U R C E >------------------------Select one of |authors=, |authorn= / |lastn / firstn=, or |vauthors= as the source of the author name list orselect one of |editorn= / editor-lastn= / |editor-firstn= or |veditors= as the source of the editor name list.Only one of these appropriate three will be used.  The hierarchy is: |authorn= (and aliases) highest and |authors= lowest;|editorn= (and aliases) highest and |veditors= lowest (support for |editors= withdrawn)When looking for |authorn= / |editorn= parameters, test |xxxxor1= and |xxxxor2= (and all of their aliases); stops after the secondtest which mimicks the test used in extract_names() when looking for a hole in the author name list.  There may be a betterway to do this, I just haven't discovered what that way is.Emits an error message when more than one xxxxor name source is provided.In this function, vxxxxors = vauthors or veditors; xxxxors = authors as appropriate.]]local function select_author_editor_source (vxxxxors, xxxxors, args, list_name)	local lastfirst = false;	if utilities.select_one ( args, cfg.aliases[list_name .. '-Last'], 'none', 1 ) or		-- do this twice in case we have a |first1= without a |last1=; this ...		utilities.select_one ( args, cfg.aliases[list_name .. '-First'], 'none', 1 ) or		-- ... also catches the case where |first= is used with |vauthors=		utilities.select_one ( args, cfg.aliases[list_name .. '-Last'], 'none', 2 ) or		utilities.select_one ( args, cfg.aliases[list_name .. '-First'], 'none', 2 ) then			lastfirst = true;	end	if (utilities.is_set (vxxxxors) and true == lastfirst) or					-- these are the three error conditions		(utilities.is_set (vxxxxors) and utilities.is_set (xxxxors)) or		(true == lastfirst and utilities.is_set (xxxxors)) then			local err_name;			if 'AuthorList' == list_name then									-- figure out which name should be used in error message				err_name = 'author';			else				err_name = 'editor';			end			utilities.set_message ('err_redundant_parameters', err_name .. '-name-list parameters');	-- add error message	end	if true == lastfirst then return 1 end;										-- return a number indicating which author name source to use	if utilities.is_set (vxxxxors) then return 2 end;	if utilities.is_set (xxxxors) then return 3 end;	return 1;																	-- no authors so return 1; this allows missing author name test to run in case there is a first without last end--[[--------------------------< I S _ V A L I D _ P A R A M E T E R _ V A L U E >------------------------------This function is used to validate a parameter's assigned value for those parameters that have only a limited numberof allowable values (yes, y, true, live, dead, etc.).  When the parameter value has not been assigned a value (missingor empty in the source template) the function returns the value specified by ret_val.  If the parameter value is oneof the list of allowed values returns the translated value; else, emits an error message and returns the valuespecified by ret_val.TODO: explain <invert>]]local function is_valid_parameter_value (value, name, possible, ret_val, invert)	if not utilities.is_set (value) then		return ret_val;															-- an empty parameter is ok	end	if (not invert and utilities.in_array (value, possible)) then				-- normal; <value> is in <possible> table		return cfg.keywords_xlate[value];										-- return translation of parameter keyword	elseif invert and not utilities.in_array (value, possible) then				-- invert; <value> is not in <possible> table		return value;															-- return <value> as it is	else		utilities.set_message ('err_invalid_param_val', {name, value});			-- not an allowed value so add error message		return ret_val;	endend--[[--------------------------< T E R M I N A T E _ N A M E _ L I S T >----------------------------------------This function terminates a name list (author, contributor, editor) with a separator character (sepc) and a spacewhen the last character is not a sepc character or when the last three characters are not sepc followed by twoclosing square brackets (close of a wikilink).  When either of these is true, the name_list is terminated with asingle space character.]]local function terminate_name_list (name_list, sepc)	if (string.sub (name_list, -3, -1) == sepc .. '. ') then					-- if already properly terminated		return name_list;														-- just return the name list	elseif (string.sub (name_list, -1, -1) == sepc) or (string.sub (name_list, -3, -1) == sepc .. ']]') then	-- if last name in list ends with sepc char		return name_list .. " ";												-- don't add another	else		return name_list .. sepc .. ' ';										-- otherwise terminate the name list	endend--[[-------------------------< F O R M A T _ V O L U M E _ I S S U E >-----------------------------------------returns the concatenation of the formatted volume and issue (or journal article number) parameters as a singlestring; or formatted volume or formatted issue, or an empty string if neither are set.]]	local function format_volume_issue (volume, issue, article, cite_class, origin, sepc, lower)	if not utilities.is_set (volume) and not utilities.is_set (issue) and not utilities.is_set (article) then		return '';	end	-- same condition as in format_pages_sheets()	local is_journal = 'journal' == cite_class or (utilities.in_array (cite_class, {'citation', 'map', 'interview'}) and 'journal' == origin);	local is_numeric_vol = volume and (volume:match ('^[MDCLXVI]+$') or volume:match ('^%d+$'));	-- is only uppercase roman numerals or only digits?	local is_long_vol = volume and (4 < mw.ustring.len(volume));				-- is |volume= value longer than 4 characters?		if volume and (not is_numeric_vol and is_long_vol) then						-- when not all digits or Roman numerals, is |volume= longer than 4 characters?		utilities.add_prop_cat ('long-vol');									-- yes, add properties cat	end	if is_journal then															-- journal-style formatting		local vol = '';		if utilities.is_set (volume) then			if is_numeric_vol then												-- |volume= value all digits or all uppercase Roman numerals?				vol = utilities.substitute (cfg.presentation['vol-bold'], {sepc, volume});	-- render in bold face			elseif is_long_vol then												-- not all digits or Roman numerals; longer than 4 characters?				vol = utilities.substitute (cfg.messages['j-vol'], {sepc, utilities.hyphen_to_dash (volume)});	-- not bold			else																-- four or fewer characters				vol = utilities.substitute (cfg.presentation['vol-bold'], {sepc, utilities.hyphen_to_dash (volume)});	-- bold			end		end		vol = vol .. (utilities.is_set (issue) and utilities.substitute (cfg.messages['j-issue'], issue) or '')		vol = vol .. (utilities.is_set (article) and utilities.substitute (cfg.messages['j-article-num'], article) or '')		return vol;	end		if 'podcast' == cite_class and utilities.is_set (issue) then		return wrap_msg ('issue', {sepc, issue}, lower);	end		if 'conference' == cite_class and utilities.is_set (article) then			-- |article-number= supported only in journal and conference cites		if utilities.is_set (volume) and utilities.is_set (article) then		-- both volume and article number			return wrap_msg ('vol-art', {sepc, utilities.hyphen_to_dash (volume), article}, lower);		elseif utilities.is_set (article) then									-- article number alone; when volume alone, handled below			return wrap_msg ('art', {sepc, article}, lower);		end	end	-- all other types of citation	if utilities.is_set (volume) and utilities.is_set (issue) then		return wrap_msg ('vol-no', {sepc, utilities.hyphen_to_dash (volume), issue}, lower);	elseif utilities.is_set (volume) then		return wrap_msg ('vol', {sepc, utilities.hyphen_to_dash (volume)}, lower);	else		return wrap_msg ('issue', {sepc, issue}, lower);	endend--[[-------------------------< F O R M A T _ P A G E S _ S H E E T S >-----------------------------------------adds static text to one of |page(s)= or |sheet(s)= values and returns it with all of the others set to empty strings.The return order is:	page, pages, sheet, sheetsSingular has priority over plural when both are provided.]]local function format_pages_sheets (page, pages, sheet, sheets, cite_class, origin, sepc, nopp, lower)	if 'map' == cite_class then													-- only cite map supports sheet(s) as in-source locators		if utilities.is_set (sheet) then			if 'journal' == origin then				return '', '', wrap_msg ('j-sheet', sheet, lower), '';			else				return '', '', wrap_msg ('sheet', {sepc, sheet}, lower), '';			end		elseif utilities.is_set (sheets) then			if 'journal' == origin then				return '', '', '', wrap_msg ('j-sheets', sheets, lower);			else				return '', '', '', wrap_msg ('sheets', {sepc, sheets}, lower);			end		end	end	local is_journal = 'journal' == cite_class or (utilities.in_array (cite_class, {'citation', 'map', 'interview'}) and 'journal' == origin);		if utilities.is_set (page) then		if is_journal then			return utilities.substitute (cfg.messages['j-page(s)'], page), '', '', '';		elseif not nopp then			return utilities.substitute (cfg.messages['p-prefix'], {sepc, page}), '', '', '';		else			return utilities.substitute (cfg.messages['nopp'], {sepc, page}), '', '', '';		end	elseif utilities.is_set (pages) then		if is_journal then			return utilities.substitute (cfg.messages['j-page(s)'], pages), '', '', '';		elseif tonumber(pages) ~= nil and not nopp then							-- if pages is only digits, assume a single page number			return '', utilities.substitute (cfg.messages['p-prefix'], {sepc, pages}), '', '';		elseif not nopp then			return '', utilities.substitute (cfg.messages['pp-prefix'], {sepc, pages}), '', '';		else			return '', utilities.substitute (cfg.messages['nopp'], {sepc, pages}), '', '';		end	end		return '', '', '', '';														-- return empty stringsend--[[--------------------------< I N S O U R C E _ L O C _ G E T >----------------------------------------------returns one of the in-source locators: page, pages, or at. If any of these are interwiki links to Wikisource, returns the label portion of the interwiki-link as plain textfor use in COinS.  This COinS thing is done because here we convert an interwiki-link to an external link andadd an icon span around that; get_coins_pages() doesn't know about the span.  TODO: should it?  TODO: add support for sheet and sheets?; streamline;TODO: make it so that this function returns only one of the three as the single in-source (the return value assignedto a new name)?]]local function insource_loc_get (page, page_orig, pages, pages_orig, at)	local ws_url, ws_label, coins_pages, L;										-- for Wikisource interwiki-links; TODO: this corrupts page metadata (span remains in place after cleanup; fix there?)	if utilities.is_set (page) then		if utilities.is_set (pages) or utilities.is_set (at) then			pages = '';															-- unset the others			at = '';		end		extra_text_in_page_check (page, page_orig);								-- emit error message when |page= value begins with what looks like p., pp., etc.		ws_url, ws_label, L = wikisource_url_make (page);						-- make ws URL from |page= interwiki link; link portion L becomes tooltip label		if ws_url then			page = external_link (ws_url, ws_label .. '&nbsp;', 'ws link in page');	-- space char after label to move icon away from in-source text; TODO: a better way to do this?			page = utilities.substitute (cfg.presentation['interwiki-icon'], {cfg.presentation['class-wikisource'], L, page});			coins_pages = ws_label;		end	elseif utilities.is_set (pages) then		if utilities.is_set (at) then			at = '';															-- unset		end		extra_text_in_page_check (pages, pages_orig);							-- emit error message when |page= value begins with what looks like p., pp., etc.		ws_url, ws_label, L = wikisource_url_make (pages);						-- make ws URL from |pages= interwiki link; link portion L becomes tooltip label		if ws_url then			pages = external_link (ws_url, ws_label .. '&nbsp;', 'ws link in pages');	-- space char after label to move icon away from in-source text; TODO: a better way to do this?			pages = utilities.substitute (cfg.presentation['interwiki-icon'], {cfg.presentation['class-wikisource'], L, pages});			coins_pages = ws_label;		end	elseif utilities.is_set (at) then		ws_url, ws_label, L = wikisource_url_make (at);							-- make ws URL from |at= interwiki link; link portion L becomes tooltip label		if ws_url then			at = external_link (ws_url, ws_label .. '&nbsp;', 'ws link in at');	-- space char after label to move icon away from in-source text; TODO: a better way to do this?			at = utilities.substitute (cfg.presentation['interwiki-icon'], {cfg.presentation['class-wikisource'], L, at});			coins_pages = ws_label;		end	end		return page, pages, at, coins_pages;end--[[--------------------------< I S _ U N I Q U E _ A R C H I V E _ U R L >------------------------------------add error message when |archive-url= value is same as |url= or chapter-url= (or alias...) value]]local function is_unique_archive_url (archive, url, c_url, source, date)	if utilities.is_set (archive) then		if archive == url or archive == c_url then			utilities.set_message ('err_bad_url', {utilities.wrap_style ('parameter', source)});	-- add error message			return '', '';														-- unset |archive-url= and |archive-date= because same as |url= or |chapter-url=		end	end	return archive, date;end--[=[-------------------------< A R C H I V E _ U R L _ C H E C K >--------------------------------------------Check archive.org URLs to make sure they at least look like they are pointing at valid archives and not to the save snapshot URL or to calendar pages.  When the archive URL is 'https://web.archive.org/save/' (or http://...)archive.org saves a snapshot of the target page in the URL.  That is something that Wikipedia should not allowunwitting readers to do.When the archive.org URL does not have a complete timestamp, archive.org chooses a snapshot according to its ownalgorithm or provides a calendar 'search' result.  [[WP:ELNO]] discourages links to search results.This function looks at the value assigned to |archive-url= and returns empty strings for |archive-url= and|archive-date= and an error message when:	|archive-url= holds an archive.org save command URL	|archive-url= is an archive.org URL that does not have a complete timestamp (YYYYMMDDhhmmss 14 digits) in the		correct placeotherwise returns |archive-url= and |archive-date=There are two mostly compatible archive.org URLs:	//web.archive.org/<timestamp>...		-- the old form	//web.archive.org/web/<timestamp>...	-- the new formThe old form does not support or map to the new form when it contains a display flag.  There are four identified flags('id_', 'js_', 'cs_', 'im_') but since archive.org ignores others following the same form (two letters and an underscore)we don't check for these specific flags but we do check the form.This function supports a preview mode.  When the article is rendered in preview mode, this function may return a modifiedarchive URL:	for save command errors, return undated wildcard (/*/)	for timestamp errors when the timestamp has a wildcard, return the URL unmodified	for timestamp errors when the timestamp does not have a wildcard, return with timestamp limited to six digits plus wildcard (/yyyymm*/)A secondary function is to return an archive-url timestamp from those urls that have them (archive.org andarchive.today).  The timestamp is used by validation.archive_date_check() to see if the value in |archive-date=matches the timestamp in the archive url.]=]local function archive_url_check (url, date)	local err_msg = '';															-- start with the error message empty	local path, timestamp, flag;												-- portions of the archive.org URL		timestamp = url:match ('//archive.today/(%d%d%d%d%d%d%d%d%d%d%d%d%d%d)/') or	-- get timestamp from archive.today urls		url:match ('//archive.today/(%d%d%d%d%.%d%d%.%d%d%-%d%d%d%d%d%d)/');		-- this timestamp needs cleanup	if timestamp then															-- if this was an archive.today url ...		return url, date, timestamp:gsub ('[%.%-]', '');						-- return ArchiveURL, ArchiveDate, and timestamp (dots and dashes removed) from |archive-url=, and done	end																				-- here for archive.org urls	if (not url:match('//web%.archive%.org/')) and (not url:match('//liveweb%.archive%.org/')) then		-- also deprecated liveweb Wayback machine URL		return url, date;														-- not an archive.org archive, return ArchiveURL and ArchiveDate	end	if url:match('//web%.archive%.org/save/') then								-- if a save command URL, we don't want to allow saving of the target page 		err_msg = cfg.err_msg_supl.save;		url = url:gsub ('(//web%.archive%.org)/save/', '%1/*/', 1);				-- for preview mode: modify ArchiveURL	elseif url:match('//liveweb%.archive%.org/') then		err_msg = cfg.err_msg_supl.liveweb;	else		path, timestamp, flag = url:match('//web%.archive%.org/([^%d]*)(%d+)([^/]*)/');	-- split out some of the URL parts for evaluation		if not path then														-- malformed in some way; pattern did not match			err_msg = cfg.err_msg_supl.timestamp;		elseif 14 ~= timestamp:len() then										-- path and flag optional, must have 14-digit timestamp here			err_msg = cfg.err_msg_supl.timestamp;			if '*' ~= flag then				local replacement = timestamp:match ('^%d%d%d%d%d%d') or timestamp:match ('^%d%d%d%d');	-- get the first 6 (YYYYMM) or first 4 digits (YYYY)				if replacement then												-- nil if there aren't at least 4 digits (year)					replacement = replacement .. string.rep ('0', 14 - replacement:len());	-- year or yearmo (4 or 6 digits) zero-fill to make 14-digit timestamp					url=url:gsub ('(//web%.archive%.org/[^%d]*)%d[^/]*', '%1' .. replacement .. '*', 1)	-- for preview, modify ts to 14 digits plus splat for calendar display				end			end		elseif utilities.is_set (path) and 'web/' ~= path then					-- older archive URLs do not have the extra 'web/' path element			err_msg = cfg.err_msg_supl.path;		elseif utilities.is_set (flag) and not utilities.is_set (path) then		-- flag not allowed with the old form URL (without the 'web/' path element)			err_msg = cfg.err_msg_supl.flag;		elseif utilities.is_set (flag) and not flag:match ('%a%a_') then		-- flag if present must be two alpha characters and underscore (requires 'web/' path element)			err_msg = cfg.err_msg_supl.flag;		else			return url, date, timestamp;										-- return ArchiveURL, ArchiveDate, and timestamp from |archive-url=		end	end																				-- if here, something not right so	utilities.set_message ('err_archive_url', {err_msg});						-- add error message and	if is_preview_mode then		return url, date, timestamp;											-- preview mode so return ArchiveURL, ArchiveDate, and timestamp from |archive-url=	else		return '', '';															-- return empty strings for ArchiveURL and ArchiveDate	endend--[[--------------------------< P L A C E _ C H E C K >--------------------------------------------------------check |place=, |publication-place=, |location= to see if these params include digits.  This function added becausemany editors misuse location to specify the in-source location (|page(s)= and |at= are supposed to do that)returns the original parameter value without modification; added maint cat when parameter value contains digits]]local function place_check (param_val)	if not utilities.is_set (param_val) then									-- parameter empty or omitted		return param_val;														-- return that empty state	end		if mw.ustring.find (param_val, '%d') then									-- not empty, are there digits in the parameter value		utilities.set_message ('maint_location');								-- yep, add maint cat	end		return param_val;															-- and doneend--[[--------------------------< I S _ A R C H I V E D _ C O P Y >----------------------------------------------compares |title= to 'Archived copy' (placeholder added by bots that can't find proper title); if matches, return true; nil else]]local function is_archived_copy (title)	title = mw.ustring.lower(title);											-- switch title to lower case	if title:find (cfg.special_case_translation.archived_copy.en) then			-- if title is 'Archived copy'		return true;	elseif cfg.special_case_translation.archived_copy['local'] then		if mw.ustring.find (title, cfg.special_case_translation.archived_copy['local']) then	-- mw.ustring() because might not be Latin script			return true;		end	endend--[[--------------------------< D I S P L A Y _ N A M E S _ S E L E C T >--------------------------------------for any of the |display-authors=, |display-editors=, etc parameters, select either the local or global setting.When both are present, look at <local_display_names> value.  When the value is some sort of 'et al.'string,special handling is required.When {{cs1 config}} has |display-<namelist>= AND this template has |display-<namelist>=etal AND:	the number of names specified by <number_of_names> is:		greater than the number specified in the global |display-<namelist>= parameter (<global_display_names>)			use global |display-<namelist>= parameter value			set overridden maint category		less than or equal to the number specified in the global |display-<namelist>=  parameter			use local |display-<namelist>= parameter valueThe purpose of this function is to prevent categorizing a template that has fewer names than the global settingto keep the etal annotation specified by <local_display_names>.]]local function display_names_select (global_display_names, local_display_names, param_name, number_of_names, test)	if global_display_names and utilities.is_set (local_display_names) then		-- when both		if 'etal' == local_display_names:lower():gsub("[ '%.]", '') then		-- the :gsub() portion makes 'etal' from a variety of 'et al.' spellings and stylings			number_of_names = tonumber (number_of_names);						-- convert these to numbers for comparison			local global_display_names_num = tonumber (global_display_names);	-- <global_display_names> not set when parameter value is not digits			if number_of_names > global_display_names_num then					-- template has more names than global config allows to be displayed?				utilities.set_message ('maint_overridden_setting');				-- set a maint message because global is overriding local |display-<namelist>=etal				return global_display_names, 'cs1 config';						-- return global with spoof parameter name (for get_display_names())			else				return local_display_names, param_name;							-- return local because fewer names so let <local_display_names> control			end		end																				-- here when <global_display_names> and <local_display_names> both numbers; <global_display_names> controls		utilities.set_message ('maint_overridden_setting');						-- set a maint message		return global_display_names, 'cs1 config';								-- return global with spoof parameter name (for get_display_names())	end																				-- here when only one of <global_display_names> or <local_display_names> set	if global_display_names then		return global_display_names, 'cs1 config';								-- return global with spoof parameter name (for get_display_names())	else		return local_display_names, param_name;									-- return local	endend--[[--------------------------< M O D E _ S E T >--------------------------------------------------------------fetch global mode setting from {{cs1 config}} (if present) or from |mode= (if present); global setting overrideslocal |mode= parameter value.  When both are present, emit maintenance message]]local function mode_set (Mode, Mode_origin)	local mode;	if cfg.global_cs1_config_t['Mode'] then										-- global setting in {{cs1 config}}; nil when empty or assigned value invalid		mode = is_valid_parameter_value (cfg.global_cs1_config_t['Mode'], 'cs1 config: mode', cfg.keywords_lists['mode'], '');	-- error messaging 'param' here is a hoax	else		mode = is_valid_parameter_value (Mode, Mode_origin, cfg.keywords_lists['mode'], '');	end	if cfg.global_cs1_config_t['Mode'] and utilities.is_set (Mode) then			-- when template has |mode=<something> which global setting has overridden		utilities.set_message ('maint_overridden_setting');						-- set a maint message	end	return mode;end--[[--------------------------< Q U O T E _ M A K E >----------------------------------------------------------create quotation from |quote=, |trans-quote=, and/or script-quote= with or without |quote-page= or |quote-pages=when any of those three quote parameters are set, this function unsets <PostScript>.  When none of those parametersare set, |quote-page= and |quote-pages= are unset to nil so that they are not included in the template's metadata]]local function quote_make (quote, trans_quote, script_quote, quote_page, quote_pages, nopp, sepc, postscript)	if utilities.is_set (quote) or utilities.is_set (trans_quote) or utilities.is_set (script_quote) then		if utilities.is_set (quote) then			if quote:sub(1, 1) == '"' and quote:sub(-1, -1) == '"' then			-- if first and last characters of quote are quote marks				quote = quote:sub(2, -2);										-- strip them off			end		end				quote = kern_quotes (quote);											-- kern if needed		quote = utilities.wrap_style ('quoted-text', quote );					-- wrap in <q>...</q> tags			if utilities.is_set (script_quote) then			quote = script_concatenate (quote, script_quote, 'script-quote');	-- <bdi> tags, lang attribute, categorization, etc.; must be done after quote is wrapped		end		if utilities.is_set (trans_quote) then			if trans_quote:sub(1, 1) == '"' and trans_quote:sub(-1, -1) == '"' then -- if first and last characters of |trans-quote are quote marks				trans_quote = trans_quote:sub(2, -2); -- strip them off			end			quote = quote .. " " .. utilities.wrap_style ('trans-quoted-title', trans_quote );		end		if utilities.is_set (quote_page) or utilities.is_set (quote_pages) then	-- add page prefix			local quote_prefix = '';			if utilities.is_set (quote_page) then				extra_text_in_page_check (quote_page, 'quote-page');			-- add to maint cat if |quote-page= value begins with what looks like p., pp., etc.				if not nopp then					quote_prefix = utilities.substitute (cfg.messages['p-prefix'], {sepc, quote_page}), '', '', '';				else					quote_prefix = utilities.substitute (cfg.messages['nopp'], {sepc, quote_page}), '', '', '';				end			elseif utilities.is_set (quote_pages) then				extra_text_in_page_check (quote_pages, 'quote-pages');			-- add to maint cat if |quote-pages= value begins with what looks like p., pp., etc.				if tonumber(quote_pages) ~= nil and not nopp then				-- if only digits, assume single page					quote_prefix = utilities.substitute (cfg.messages['p-prefix'], {sepc, quote_pages}), '', '';				elseif not nopp then					quote_prefix = utilities.substitute (cfg.messages['pp-prefix'], {sepc, quote_pages}), '', '';				else					quote_prefix = utilities.substitute (cfg.messages['nopp'], {sepc, quote_pages}), '', '';				end			end                        			quote = quote_prefix .. ": " .. quote;		else			quote = sepc .. " " .. quote;		end		postscript = "";														-- cs1|2 does not supply terminal punctuation when |quote= is set		elseif utilities.is_set (quote_page) or utilities.is_set (quote_pages) then		quote_page = nil;														-- unset; these require |quote=; TODO: error message?		quote_pages = nil;	end	return quote, quote_page, quote_pages, postscript;end--[[--------------------------< C H E C K _ P U B L I S H E R _ N A M E >--------------------------------------look for variations of '<text>: <text>' that might be '<location>: <publisher>' in |publisher= parameter value.when found, emit a maintenance message; return nil else<publisher> is the value assigned to |publisher= or |institution=]]local function check_publisher_name (publisher)	local patterns_t = {		'^[%w%s]+%s*:%s*[%w%s]+$',												-- plain text <location>: <publisher>		'^%[+[%w%s:|]+%]+%s*:%s*[%w%s]+$',										-- partially wikilinked [[<location>]]: <publisher>		'^[%w%s]+%s*:%s*%[+[%w%s:|]+%]+$',										-- partially wikilinked <location>: [[<publisher>]]		'^%[+[%w%s:|]+%]+%s*:%s*%[+[%w%s:|]+%]+$',								-- wikilinked [[<location>]]: [[<publisher>]]		}		for _, pattern in ipairs (patterns_t) do									-- spin through the patterns_t sequence		if mw.ustring.match (publisher, pattern) then							-- does this pattern match?			utilities.set_message ('maint_publisher_location');					-- set a maint message			return;																-- and done		end	endend--[[--------------------------< C I T A T I O N 0 >------------------------------------------------------------This is the main function doing the majority of the citation formatting.]]local function citation0( config, args )	--[[ 	Load Input Parameters	The argument_wrapper facilitates the mapping of multiple aliases to single internal variable.	]]	local A = argument_wrapper ( args );	local i 	-- Pick out the relevant fields from the arguments.  Different citation templates	-- define different field names for the same underlying things.		local author_etal;	local a	= {};																-- authors list from |lastn= / |firstn= pairs or |vauthors=	local Authors;	local NameListStyle;		if cfg.global_cs1_config_t['NameListStyle'] then						-- global setting in {{cs1 config}} overrides local |name-list-style= parameter value; nil when empty or assigned value invalid			NameListStyle = is_valid_parameter_value (cfg.global_cs1_config_t['NameListStyle'], 'cs1 config: name-list-style', cfg.keywords_lists['name-list-style'], '');	-- error messaging 'param' here is a hoax		else			NameListStyle = is_valid_parameter_value (A['NameListStyle'], A:ORIGIN('NameListStyle'), cfg.keywords_lists['name-list-style'], '');		end		if cfg.global_cs1_config_t['NameListStyle'] and utilities.is_set (A['NameListStyle']) then	-- when template has |name-list-style=<something> which global setting has overridden			utilities.set_message ('maint_overridden_setting');					-- set a maint message		end	local Collaboration = A['Collaboration'];	do																			-- to limit scope of selected		local selected = select_author_editor_source (A['Vauthors'], A['Authors'], args, 'AuthorList');		if 1 == selected then			a, author_etal = extract_names (args, 'AuthorList');				-- fetch author list from |authorn= / |lastn= / |firstn=, |author-linkn=, and |author-maskn=		elseif 2 == selected then			NameListStyle = 'vanc';												-- override whatever |name-list-style= might be			a, author_etal = parse_vauthors_veditors (args, A['Vauthors'], 'AuthorList');	-- fetch author list from |vauthors=, |author-linkn=, and |author-maskn=		elseif 3 == selected then			Authors = A['Authors'];												-- use content of |people= or |credits=; |authors= is deprecated; TODO: constrain |people= and |credits= to cite av media, episode, serial?		end		if utilities.is_set (Collaboration) then			author_etal = true;													-- so that |display-authors=etal not required		end	end	local editor_etal;	local e	= {};																-- editors list from |editor-lastn= / |editor-firstn= pairs or |veditors=	do																			-- to limit scope of selected		local selected = select_author_editor_source (A['Veditors'], nil, args, 'EditorList');	-- support for |editors= withdrawn		if 1 == selected then			e, editor_etal = extract_names (args, 'EditorList');				-- fetch editor list from |editorn= / |editor-lastn= / |editor-firstn=, |editor-linkn=, and |editor-maskn=		elseif 2 == selected then			NameListStyle = 'vanc';												-- override whatever |name-list-style= might be			e, editor_etal = parse_vauthors_veditors (args, args.veditors, 'EditorList');	-- fetch editor list from |veditors=, |editor-linkn=, and |editor-maskn=		end	end								local Chapter = A['Chapter'];												-- done here so that we have access to |contribution= from |chapter= aliases	local Chapter_origin = A:ORIGIN ('Chapter');	local Contribution;															-- because contribution is required for contributor(s)		if 'contribution' == Chapter_origin then			Contribution = Chapter;												-- get the name of the contribution		end	local c = {};																-- contributors list from |contributor-lastn= / contributor-firstn= pairs		if utilities.in_array (config.CitationClass, {"book", "citation"}) and not utilities.is_set (A['Periodical']) then	-- |contributor= and |contribution= only supported in book cites		c = extract_names (args, 'ContributorList');							-- fetch contributor list from |contributorn= / |contributor-lastn=, -firstn=, -linkn=, -maskn=				if 0 < #c then			if not utilities.is_set (Contribution) then							-- |contributor= requires |contribution=				utilities.set_message ('err_contributor_missing_required_param', 'contribution');	-- add missing contribution error message				c = {};															-- blank the contributors' table; it is used as a flag later			end			if 0 == #a then														-- |contributor= requires |author=				utilities.set_message ('err_contributor_missing_required_param', 'author');	-- add missing author error message				c = {};															-- blank the contributors' table; it is used as a flag later			end		end	else																		-- if not a book cite		if utilities.select_one (args, cfg.aliases['ContributorList-Last'], 'err_redundant_parameters', 1 ) then	-- are there contributor name list parameters?			utilities.set_message ('err_contributor_ignored');					-- add contributor ignored error message		end		Contribution = nil;														-- unset	end	local Title = A['Title'];	local TitleLink = A['TitleLink'];	local auto_select = '';														-- default is auto	local accept_link;	TitleLink, accept_link = utilities.has_accept_as_written (TitleLink, true);	-- test for accept-this-as-written markup	if (not accept_link) and utilities.in_array (TitleLink, {'none', 'pmc', 'doi'}) then -- check for special keywords		auto_select = TitleLink;												-- remember selection for later		TitleLink = '';															-- treat as if |title-link= would have been empty	end	TitleLink = link_title_ok (TitleLink, A:ORIGIN ('TitleLink'), Title, 'title');	-- check for wiki-markup in |title-link= or wiki-markup in |title= when |title-link= is set	local Section = '';															-- {{cite map}} only; preset to empty string for concatenation if not used	if 'map' == config.CitationClass and 'section' == Chapter_origin then		Section = A['Chapter'];													-- get |section= from |chapter= alias list; |chapter= and the other aliases not supported in {{cite map}}		Chapter = '';															-- unset for now; will be reset later from |map= if present	end	local Periodical = A['Periodical'];	local Periodical_origin = A:ORIGIN('Periodical');	local ScriptPeriodical = A['ScriptPeriodical'];	local ScriptPeriodical_origin = A:ORIGIN('ScriptPeriodical');	local TransPeriodical =  A['TransPeriodical'];	local TransPeriodical_origin =  A:ORIGIN ('TransPeriodical');		if (utilities.in_array (config.CitationClass, {'book', 'encyclopaedia'}) and (utilities.is_set (Periodical) or utilities.is_set (ScriptPeriodical) or utilities.is_set (TransPeriodical))) then		local param;		if utilities.is_set (Periodical) then									-- get a parameter name from one of these periodical related meta-parameters			Periodical = '';													-- unset because not valid {{cite book}} or {{cite encyclopedia}} parameters 			param = Periodical_origin											-- get parameter name for error messaging		elseif utilities.is_set (TransPeriodical) then			TransPeriodical = '';												-- unset because not valid {{cite book}} or {{cite encyclopedia}} parameters 			param = TransPeriodical_origin;										-- get parameter name for error messaging		elseif utilities.is_set (ScriptPeriodical) then			ScriptPeriodical = '';												-- unset because not valid {{cite book}} or {{cite encyclopedia}} parameters 			param = ScriptPeriodical_origin;									-- get parameter name for error messaging		end		if utilities.is_set (param) then										-- if we found one			utilities.set_message ('err_periodical_ignored', {param});			-- emit an error message		end	end	if utilities.is_set (Periodical) then		local i;		Periodical, i = utilities.strip_apostrophe_markup (Periodical);			-- strip apostrophe markup so that metadata isn't contaminated 		if i then																-- non-zero when markup was stripped so emit an error message			utilities.set_message ('err_apostrophe_markup', {Periodical_origin});		end	end	if 'mailinglist' == config.CitationClass then								-- special case for {{cite mailing list}}		if utilities.is_set (Periodical) and utilities.is_set (A ['MailingList']) then	-- both set emit an error TODO: make a function for this and similar?			utilities.set_message ('err_redundant_parameters', {utilities.wrap_style ('parameter', Periodical_origin) .. cfg.presentation['sep_list_pair'] .. utilities.wrap_style ('parameter', 'mailinglist')});		end		Periodical = A ['MailingList'];											-- error or no, set Periodical to |mailinglist= value because this template is {{cite mailing list}}		Periodical_origin = A:ORIGIN('MailingList');	end	-- web and news not tested for now because of 	-- Wikipedia:Administrators%27_noticeboard#Is_there_a_semi-automated_tool_that_could_fix_these_annoying_"Cite_Web"_errors?	if not (utilities.is_set (Periodical) or utilities.is_set (ScriptPeriodical)) then	-- 'periodical' templates require periodical parameter	--	local p = {['journal'] = 'journal', ['magazine'] = 'magazine', ['news'] = 'newspaper', ['web'] = 'website'};	-- for error message		local p = {['journal'] = 'tập san học thuật', ['magazine'] = 'tạp chí'};			-- for error message		if p[config.CitationClass]  then			utilities.set_message ('err_missing_periodical', {p[config.CitationClass], mw.ustring.gsub(p[config.CitationClass], "tập san học thuật", "tập san", 1)});		end	end		local Volume;	if 'citation' == config.CitationClass then		if utilities.is_set (Periodical) then			if not utilities.in_array (Periodical_origin, cfg.citation_no_volume_t) then	-- {{citation}} does not render |volume= when these parameters are used				Volume = A['Volume'];											-- but does for all other 'periodicals'			end		elseif utilities.is_set (ScriptPeriodical) then			if 'script-website' ~= ScriptPeriodical_origin then					-- {{citation}} does not render volume for |script-website=				Volume = A['Volume'];											-- but does for all other 'periodicals'			end		else			Volume = A['Volume'];												-- and does for non-'periodical' cites		end	elseif utilities.in_array (config.CitationClass, cfg.templates_using_volume) then	-- render |volume= for cs1 according to the configuration settings		Volume = A['Volume'];	end		extra_text_in_vol_iss_check (Volume, A:ORIGIN ('Volume'), 'v');		local Issue;	if 'citation' == config.CitationClass then		if utilities.is_set (Periodical) and utilities.in_array (Periodical_origin, cfg.citation_issue_t) then	-- {{citation}} may render |issue= when these parameters are used			Issue = utilities.hyphen_to_dash (A['Issue']);		end	elseif utilities.in_array (config.CitationClass, cfg.templates_using_issue) then	-- conference & map books do not support issue; {{citation}} listed here because included in settings table		if not (utilities.in_array (config.CitationClass, {'conference', 'map', 'citation'}) and not (utilities.is_set (Periodical) or utilities.is_set (ScriptPeriodical))) then			Issue = utilities.hyphen_to_dash (A['Issue']);		end	end		local ArticleNumber;	if utilities.in_array (config.CitationClass, {'journal', 'conference'}) or ('citation' == config.CitationClass and utilities.is_set (Periodical) and 'journal' == Periodical_origin) then		ArticleNumber = A['ArticleNumber'];	end	extra_text_in_vol_iss_check (Issue, A:ORIGIN ('Issue'), 'i');		local Page;	local Pages;	local At;	local QuotePage;	local QuotePages;	if not utilities.in_array (config.CitationClass, cfg.templates_not_using_page) then		-- TODO: rewrite to emit ignored parameter error message?		Page = A['Page'];		Pages = utilities.hyphen_to_dash (A['Pages']);			At = A['At'];		QuotePage = A['QuotePage'];		QuotePages = utilities.hyphen_to_dash (A['QuotePages']);	end		local NoPP = is_valid_parameter_value (A['NoPP'], A:ORIGIN('NoPP'), cfg.keywords_lists['yes_true_y'], nil);	local Mode = mode_set (A['Mode'], A:ORIGIN('Mode'));	-- separator character and postscript	local sepc, PostScript = set_style (Mode:lower(), A['PostScript'], config.CitationClass);	local Quote;	Quote, QuotePage, QuotePages, PostScript = quote_make (A['Quote'], A['TransQuote'], A['ScriptQuote'], QuotePage, QuotePages, NoPP, sepc, PostScript);	local Edition = A['Edition'];	local PublicationPlace = place_check (A['PublicationPlace'], A:ORIGIN('PublicationPlace'));	local Place = place_check (A['Place'], A:ORIGIN('Place'));		local PublisherName = A['PublisherName'];	local PublisherName_origin = A:ORIGIN('PublisherName');	if utilities.is_set (PublisherName) and (cfg.keywords_xlate['none'] ~= PublisherName) then		local i = 0;		PublisherName, i = utilities.strip_apostrophe_markup (PublisherName);	-- strip apostrophe markup so that metadata isn't contaminated; publisher is never italicized		if i and (0 < i) then													-- non-zero when markup was stripped so emit an error message			utilities.set_message ('err_apostrophe_markup', {PublisherName_origin});		end	end		if ('document' == config.CitationClass) and not utilities.is_set (PublisherName) then		utilities.set_message ('err_missing_publisher', {'tài liệu', 'nhà xuất bản'});	end	local Newsgroup = A['Newsgroup'];											-- TODO: strip apostrophe markup?	local Newsgroup_origin = A:ORIGIN('Newsgroup');		if 'newsgroup' == config.CitationClass then		if utilities.is_set (PublisherName) and (cfg.keywords_xlate['none'] ~= PublisherName) then	-- general use parameter |publisher= not allowed in cite newsgroup			utilities.set_message ('err_parameter_ignored', {PublisherName_origin});		end		PublisherName = nil;													-- ensure that this parameter is unset for the time being; will be used again after COinS	end		if 'book' == config.CitationClass or 'encyclopaedia' == config.CitationClass or ('citation' == config.CitationClass and not utilities.is_set (Periodical)) then		local accept;		PublisherName, accept = utilities.has_accept_as_written (PublisherName);	-- check for and remove accept-as-written markup from |publisher= wrapped		if not accept then														-- when no accept-as-written markup			check_publisher_name (PublisherName);								-- emit maint message when |publisher= might be prefixed with publisher's location		end	end	local URL = A['URL'];														-- TODO: better way to do this for URL, ChapterURL, and MapURL?	local UrlAccess = is_valid_parameter_value (A['UrlAccess'], A:ORIGIN('UrlAccess'), cfg.keywords_lists['url-access'], nil);		if not utilities.is_set (URL) and utilities.is_set (UrlAccess) then		UrlAccess = nil;		utilities.set_message ('err_param_access_requires_param', 'url');	end		local ChapterURL = A['ChapterURL'];	local ChapterUrlAccess = is_valid_parameter_value (A['ChapterUrlAccess'], A:ORIGIN('ChapterUrlAccess'), cfg.keywords_lists['url-access'], nil);	if not utilities.is_set (ChapterURL) and utilities.is_set (ChapterUrlAccess) then		ChapterUrlAccess = nil;		utilities.set_message ('err_param_access_requires_param', {A:ORIGIN('ChapterUrlAccess'):gsub ('%-access', '')});	end	local MapUrlAccess = is_valid_parameter_value (A['MapUrlAccess'], A:ORIGIN('MapUrlAccess'), cfg.keywords_lists['url-access'], nil);	if not utilities.is_set (A['MapURL']) and utilities.is_set (MapUrlAccess) then		MapUrlAccess = nil;		utilities.set_message ('err_param_access_requires_param', {'map-url'});	end	local this_page = mw.title.getCurrentTitle();								-- also used for COinS and for language	local no_tracking_cats = is_valid_parameter_value (A['NoTracking'], A:ORIGIN('NoTracking'), cfg.keywords_lists['yes_true_y'], nil);	-- check this page to see if it is in one of the namespaces that cs1 is not supposed to add to the error categories	if not utilities.is_set (no_tracking_cats) then								-- ignore if we are already not going to categorize this page		if cfg.uncategorized_namespaces[this_page.namespace] then				-- is this page's namespace id one of the uncategorized namespace ids?			no_tracking_cats = "true";											-- set no_tracking_cats		end		for _, v in ipairs (cfg.uncategorized_subpages) do						-- cycle through page name patterns			if this_page.text:match (v) then									-- test page name against each pattern				no_tracking_cats = "true";										-- set no_tracking_cats				break;															-- bail out if one is found			end		end	end																				-- check for extra |page=, |pages= or |at= parameters. (also sheet and sheets while we're at it)	utilities.select_one (args, {'page', 'p', 'pp', 'pages', 'at', 'sheet', 'sheets'}, 'err_redundant_parameters');	-- this is a dummy call simply to get the error message and category	local coins_pages;		Page, Pages, At, coins_pages = insource_loc_get (Page, A:ORIGIN('Page'), Pages, A:ORIGIN('Pages'), At);	if utilities.is_set (PublicationPlace) and utilities.is_set (Place) then	-- both |publication-place= and |place= (|location=) allowed if different		utilities.add_prop_cat ('location-test');								-- add property cat to evaluate how often PublicationPlace and Place are used together		if PublicationPlace == Place then			Place = '';															-- unset; don't need both if they are the same		end	elseif not utilities.is_set (PublicationPlace) and utilities.is_set (Place) then	-- when only |place= (|location=) is set ...		PublicationPlace = Place;												-- promote |place= (|location=) to |publication-place	end	if PublicationPlace == Place then Place = ''; end							-- don't need both if they are the same	local URL_origin = A:ORIGIN('URL');											-- get name of parameter that holds URL	local ChapterURL_origin = A:ORIGIN('ChapterURL');							-- get name of parameter that holds ChapterURL	local ScriptChapter = A['ScriptChapter'];	local ScriptChapter_origin = A:ORIGIN ('ScriptChapter');	local Format = A['Format'];	local ChapterFormat = A['ChapterFormat'];	local TransChapter = A['TransChapter'];	local TransChapter_origin = A:ORIGIN ('TransChapter');	local TransTitle = A['TransTitle'];	local ScriptTitle = A['ScriptTitle'];		--[[	Parameter remapping for cite encyclopedia:	When the citation has these parameters:		|encyclopedia= and |title= then map |title= to |article= and |encyclopedia= to |title= for rendering		|encyclopedia= and |article= then map |encyclopedia= to |title= for rendering		|trans-title= maps to |trans-chapter= when |title= is re-mapped		|url= maps to |chapter-url= when |title= is remapped		All other combinations of |encyclopedia=, |title=, and |article= are not modified		]]	local Encyclopedia = A['Encyclopedia'];										-- used as a flag by this module and by ~/COinS	local ScriptEncyclopedia = A['ScriptEncyclopedia'];	local TransEncyclopedia = A['TransEncyclopedia'];	if utilities.is_set (Encyclopedia) or utilities.is_set (ScriptEncyclopedia) then	-- emit error message when Encyclopedia set but template is other than {{cite encyclopedia}} or {{citation}}		if 'encyclopaedia' ~= config.CitationClass and 'citation' ~= config.CitationClass then			if utilities.is_set (Encyclopedia) then				utilities.set_message ('err_parameter_ignored', {A:ORIGIN ('Encyclopedia')});			else				utilities.set_message ('err_parameter_ignored', {A:ORIGIN ('ScriptEncyclopedia')});			end			Encyclopedia = nil;													-- unset these because not supported by this template			ScriptEncyclopedia = nil;			TransEncyclopedia = nil;		end	elseif utilities.is_set (TransEncyclopedia) then		utilities.set_message ('err_trans_missing_title', {'encyclopedia'});	end	if ('encyclopaedia' == config.CitationClass) or ('citation' == config.CitationClass and utilities.is_set (Encyclopedia)) then		if utilities.is_set (Periodical) and utilities.is_set (Encyclopedia) then	-- when both parameters set emit an error message; {{citation}} only; Periodical not allowed in {{cite encyclopedia}}			utilities.set_message ('err_periodical_ignored', {Periodical_origin});		end		if utilities.is_set (Encyclopedia) or utilities.is_set (ScriptEncyclopedia) then			Periodical = Encyclopedia;											-- error or no, set Periodical to Encyclopedia for rendering; {{citation}} could (not legitimately) have both; use Encyclopedia			Periodical_origin = A:ORIGIN ('Encyclopedia');			ScriptPeriodical = ScriptEncyclopedia;			ScriptPeriodical_origin = A:ORIGIN ('ScriptEncyclopedia');			if utilities.is_set (Title) or utilities.is_set (ScriptTitle) then				if not utilities.is_set (Chapter) then					Chapter = Title;											-- |encyclopedia= and |title= are set so map |title= params to |article= params for rendering					ScriptChapter = ScriptTitle;					ScriptChapter_origin = A:ORIGIN('ScriptTitle')					TransChapter = TransTitle;					ChapterURL = URL;					ChapterURL_origin = URL_origin;					ChapterUrlAccess = UrlAccess;					ChapterFormat = Format;					if not utilities.is_set (ChapterURL) and utilities.is_set (TitleLink) then						Chapter = utilities.make_wikilink (TitleLink, Chapter);					end					Title = Periodical;											-- now map |encyclopedia= params to |title= params for rendering					ScriptTitle = ScriptPeriodical or '';					TransTitle = TransEncyclopedia or '';					Periodical = '';											-- redundant so unset					ScriptPeriodical = '';					URL = '';					Format = '';					TitleLink = '';				end			elseif utilities.is_set (Chapter) or utilities.is_set (ScriptChapter) then	-- |title= not set				Title = Periodical;												-- |encyclopedia= set and |article= set so map |encyclopedia= to |title= for rendering				ScriptTitle = ScriptPeriodical or '';				TransTitle = TransEncyclopedia or '';				Periodical = '';												-- redundant so unset				ScriptPeriodical = '';			end		end	end	-- special case for cite techreport.	local ID = A['ID'];	if (config.CitationClass == "techreport") then								-- special case for cite techreport		if utilities.is_set (A['Number']) then									-- cite techreport uses 'number', which other citations alias to 'issue'			if not utilities.is_set (ID) then									-- can we use ID for the "number"?				ID = A['Number'];												-- yes, use it			else																-- ID has a value so emit error message				utilities.set_message ('err_redundant_parameters', {utilities.wrap_style ('parameter', 'id') .. cfg.presentation['sep_list_pair'] .. utilities.wrap_style ('parameter', 'number')});			end		end		end	-- Account for the oddity that is {{cite conference}}, before generation of COinS data.	local ChapterLink -- = A['ChapterLink'];									-- deprecated as a parameter but still used internally by cite episode	local Conference = A['Conference'];	local BookTitle = A['BookTitle'];	local TransTitle_origin = A:ORIGIN ('TransTitle');	if 'conference' == config.CitationClass then		if utilities.is_set (BookTitle) then			Chapter = Title;			Chapter_origin = 'title';	--		ChapterLink = TitleLink;											-- |chapter-link= is deprecated			ChapterURL = URL;			ChapterUrlAccess = UrlAccess;			ChapterURL_origin = URL_origin;			URL_origin = '';			ChapterFormat = Format;			TransChapter = TransTitle;			TransChapter_origin = TransTitle_origin;			Title = BookTitle;			Format = '';	--		TitleLink = '';			TransTitle = '';			URL = '';		end	elseif 'speech' ~= config.CitationClass then		Conference = '';														-- not cite conference or cite speech so make sure this is empty string	end		local use_lowercase = ( sepc == ',' );										-- controls capitalization of certain static text		-- cite map oddities	local Cartography = "";	local Scale = "";	local Sheet = A['Sheet'] or '';	local Sheets = A['Sheets'] or '';	if config.CitationClass == "map" then		if utilities.is_set (Chapter) then										--TODO: make a function for this and similar?			utilities.set_message ('err_redundant_parameters', {utilities.wrap_style ('parameter', 'map') .. cfg.presentation['sep_list_pair'] .. utilities.wrap_style ('parameter', Chapter_origin)});	-- add error message		end		Chapter = A['Map'];		Chapter_origin = A:ORIGIN('Map');		ChapterURL = A['MapURL'];		ChapterURL_origin = A:ORIGIN('MapURL');		TransChapter = A['TransMap'];		ScriptChapter = A['ScriptMap']		ScriptChapter_origin = A:ORIGIN('ScriptMap')		ChapterUrlAccess = MapUrlAccess;		ChapterFormat = A['MapFormat'];		Cartography = A['Cartography'];		if utilities.is_set ( Cartography ) then			Cartography = sepc .. " " .. wrap_msg ('cartography', Cartography, use_lowercase);		end				Scale = A['Scale'];		if utilities.is_set ( Scale ) then			Scale = sepc .. " " .. Scale;		end	end	-- Account for the oddities that are {{cite episode}} and {{cite serial}}, before generation of COinS data.	local Series = A['Series'];	if 'episode' == config.CitationClass or 'serial' == config.CitationClass then		local SeriesLink = A['SeriesLink'];		SeriesLink = link_title_ok (SeriesLink, A:ORIGIN ('SeriesLink'), Series, 'series');	-- check for wiki-markup in |series-link= or wiki-markup in |series= when |series-link= is set		local Network = A['Network'];		local Station = A['Station'];		local s, n = {}, {};																				-- do common parameters first		if utilities.is_set (Network) then table.insert(n, Network); end		if utilities.is_set (Station) then table.insert(n, Station); end		ID = table.concat(n, sepc .. ' ');				if 'episode' == config.CitationClass then								-- handle the oddities that are strictly {{cite episode}}			local Season = A['Season'];			local SeriesNumber = A['SeriesNumber'];			if utilities.is_set (Season) and utilities.is_set (SeriesNumber) then	-- these are mutually exclusive so if both are set TODO: make a function for this and similar?				utilities.set_message ('err_redundant_parameters', {utilities.wrap_style ('parameter', 'season') .. cfg.presentation['sep_list_pair'] .. utilities.wrap_style ('parameter', 'seriesno')});		-- add error message				SeriesNumber = '';												-- unset; prefer |season= over |seriesno=			end																				-- assemble a table of parts concatenated later into Series			if utilities.is_set (Season) then table.insert(s, wrap_msg ('season', Season, use_lowercase)); end			if utilities.is_set (SeriesNumber) then table.insert(s, wrap_msg ('seriesnum', SeriesNumber, use_lowercase)); end			if utilities.is_set (Issue) then table.insert(s, wrap_msg ('episode', Issue, use_lowercase)); end			Issue = '';															-- unset because this is not a unique parameter				Chapter = Title;													-- promote title parameters to chapter			ScriptChapter = ScriptTitle;			ScriptChapter_origin = A:ORIGIN('ScriptTitle');			ChapterLink = TitleLink;											-- alias |episode-link=			TransChapter = TransTitle;			ChapterURL = URL;			ChapterUrlAccess = UrlAccess;			ChapterURL_origin = URL_origin;			ChapterFormat = Format;			Title = Series;														-- promote series to title			TitleLink = SeriesLink;			Series = table.concat(s, sepc .. ' ');								-- this is concatenation of season, seriesno, episode number			if utilities.is_set (ChapterLink) and not utilities.is_set (ChapterURL) then	-- link but not URL				Chapter = utilities.make_wikilink (ChapterLink, Chapter);			elseif utilities.is_set (ChapterLink) and utilities.is_set (ChapterURL) then	-- if both are set, URL links episode;				Series = utilities.make_wikilink (ChapterLink, Series);			end			URL = '';															-- unset			TransTitle = '';			ScriptTitle = '';			Format = '';					else																	-- now oddities that are cite serial			Issue = '';															-- unset because this parameter no longer supported by the citation/core version of cite serial			Chapter = A['Episode'];												-- TODO: make |episode= available to cite episode someday?			if utilities.is_set (Series) and utilities.is_set (SeriesLink) then				Series = utilities.make_wikilink (SeriesLink, Series);			end			Series = utilities.wrap_style ('italic-title', Series);				-- series is italicized		end		end	-- end of {{cite episode}} stuff	-- handle type parameter for those CS1 citations that have default values	local TitleType = A['TitleType'];	local Degree = A['Degree'];	if utilities.in_array (config.CitationClass, {'AV-media-notes', 'document', 'interview', 'mailinglist', 'map', 'podcast', 'pressrelease', 'report', 'speech', 'techreport', 'thesis'}) then		TitleType = set_titletype (config.CitationClass, TitleType);		if utilities.is_set (Degree) and "Thesis" == TitleType then				-- special case for cite thesis			TitleType = Degree .. ' ' .. cfg.title_types ['thesis']:lower();		end	end	if utilities.is_set (TitleType) then										-- if type parameter is specified		TitleType = utilities.substitute ( cfg.messages['type'], TitleType);	-- display it in parentheses	-- TODO: Hack on TitleType to fix bunched parentheses problem	end	-- legacy: promote PublicationDate to Date if neither Date nor Year are set.	local Date = A['Date']; 	local Date_origin;															-- to hold the name of parameter promoted to Date; required for date error messaging	local PublicationDate = A['PublicationDate'];	local Year = A['Year'];	if utilities.is_set (Year) then		validation.year_check (Year);											-- returns nothing; emits maint message when |year= doesn't hold a 'year' value	end			if not utilities.is_set (Date) then		Date = Year;															-- promote Year to Date		Year = nil;																-- make nil so Year as empty string isn't used for CITEREF		if not utilities.is_set (Date) and utilities.is_set (PublicationDate) then	-- use PublicationDate when |date= and |year= are not set			Date = PublicationDate;												-- promote PublicationDate to Date			Date = vi_formatdate(PublicationDate, true);			PublicationDate = '';												-- unset, no longer needed			Date_origin = A:ORIGIN('PublicationDate');							-- save the name of the promoted parameter		else			Date_origin = A:ORIGIN('Year');										-- save the name of the promoted parameter		end		if PublicationDate and #PublicationDate > 0 then PublicationDate = vi_formatdate(PublicationDate, true) end	else		Date_origin = A:ORIGIN('Date');											-- not a promotion; name required for error messaging	end	if PublicationDate == Date then PublicationDate = ''; end					-- if PublicationDate is same as Date, don't display in rendered citation	if Date and #Date > 0 then Date = vi_formatdate(Date, true) end	--[[	Go test all of the date-holding parameters for valid MOS:DATE format and make sure that dates are real dates. This must be done before we do COinS because here is where	we get the date used in the metadata.		Date validation supporting code is in Module:Citation/CS1/Date_validation	]]	local DF = is_valid_parameter_value (A['DF'], A:ORIGIN('DF'), cfg.keywords_lists['df'], '');	if not utilities.is_set (DF) then		DF = cfg.global_df;														-- local |df= if present overrides global df set by {{use xxx date}} template	end	local ArchiveURL;	local ArchiveDate;	local ArchiveFormat = A['ArchiveFormat'];	local archive_url_timestamp;												-- timestamp from wayback machine url		ArchiveURL, ArchiveDate, archive_url_timestamp = archive_url_check (A['ArchiveURL'], A['ArchiveDate'])	ArchiveFormat = style_format (ArchiveFormat, ArchiveURL, 'archive-format', 'archive-url');		ArchiveURL, ArchiveDate = is_unique_archive_url (ArchiveURL, URL, ChapterURL, A:ORIGIN('ArchiveURL'), ArchiveDate);		-- add error message when URL or ChapterURL == ArchiveURL	local AccessDate = A['AccessDate'];	local COinS_date = {};														-- holds date info extracted from |date= for the COinS metadata by Module:Date verification	local DoiBroken = A['DoiBroken'];	local Embargo = A['Embargo'];	local anchor_year;															-- used in the CITEREF identifier	do	-- create defined block to contain local variables error_message, date_parameters_list, mismatch		local error_message = '';																				-- AirDate has been promoted to Date so not necessary to check it		local date_parameters_list = {			['access-date'] = {val = AccessDate, name = A:ORIGIN ('AccessDate')},			['archive-date'] = {val = ArchiveDate, name = A:ORIGIN ('ArchiveDate')},			['date'] = {val = Date, name = Date_origin},			['doi-broken-date'] = {val = DoiBroken, name = A:ORIGIN ('DoiBroken')},			['pmc-embargo-date'] = {val = Embargo, name = A:ORIGIN ('Embargo')},			['publication-date'] = {val = PublicationDate, name = A:ORIGIN ('PublicationDate')},			['year'] = {val = Year, name = A:ORIGIN ('Year')},			};		local error_list = {};		anchor_year, Embargo = validation.dates(date_parameters_list, COinS_date, error_list);		if utilities.is_set (Year) and utilities.is_set (Date) then				-- both |date= and |year= not normally needed; 			validation.year_date_check (Year, A:ORIGIN ('Year'), Date, A:ORIGIN ('Date'), error_list);		end		if 0 == #error_list then												-- error free dates only; 0 when error_list is empty			local modified = false;												-- flag						if utilities.is_set (DF) then										-- if we need to reformat dates				modified = validation.reformat_dates (date_parameters_list, DF);	-- reformat to DF format, use long month names if appropriate			end			if true == validation.date_hyphen_to_dash (date_parameters_list) then	-- convert hyphens to dashes where appropriate				modified = true;				utilities.set_message ('maint_date_format');					-- hyphens were converted so add maint category			end				-- for those wikis that can and want to have English date names translated to the local language; not supported at en.wiki			if cfg.date_name_auto_xlate_enable and validation.date_name_xlate (date_parameters_list, cfg.date_digit_auto_xlate_enable ) then				utilities.set_message ('maint_date_auto_xlated');				-- add maint cat				modified = true;			end			if modified then													-- if the date_parameters_list values were modified				AccessDate = date_parameters_list['access-date'].val;			-- overwrite date holding parameters with modified values				ArchiveDate = date_parameters_list['archive-date'].val;				Date = date_parameters_list['date'].val;				DoiBroken = date_parameters_list['doi-broken-date'].val;				PublicationDate = date_parameters_list['publication-date'].val;			end			if archive_url_timestamp and utilities.is_set (ArchiveDate) then				validation.archive_date_check (ArchiveDate, archive_url_timestamp, DF);	-- does YYYYMMDD in archive_url_timestamp match date in ArchiveDate			end		else			utilities.set_message ('err_bad_date', {utilities.make_sep_list (#error_list, error_list)});	-- add this error message		end	end	-- end of do	if utilities.in_array (config.CitationClass, {'book', 'encyclopaedia'}) or	-- {{cite book}}, {{cite encyclopedia}}; TODO: {{cite conference}} and others?		('citation' == config.CitationClass and utilities.is_set (Encyclopedia)) or			-- {{citation}} as an encylopedia citation		('citation' == config.CitationClass and not utilities.is_set (Periodical)) then		-- {{citation}} as a book citation			if utilities.is_set (PublicationPlace) then				if not utilities.is_set (PublisherName) then					local date = COinS_date.rftdate and tonumber (COinS_date.rftdate:match ('%d%d%d%d'));	-- get year portion of COinS date (because in Arabic numerals); convert string to number					if date and (1850 <= date) then								-- location has no publisher; if date is 1850 or later						utilities.set_message ('maint_location_no_publisher');	-- add maint cat					end				else															-- PublisherName has a value					if cfg.keywords_xlate['none'] == PublisherName then			-- if that value is 'none' (only for book and encyclopedia citations)						PublisherName = '';										-- unset					end				end			end	end	local ID_list = {};															-- sequence table of rendered identifiers	local ID_list_coins = {};													-- table of identifiers and their values from args; key is same as cfg.id_handlers's key	local Class = A['Class'];													-- arxiv class identifier		local ID_support = {		{A['ASINTLD'], 'ASIN', 'err_asintld_missing_asin', A:ORIGIN ('ASINTLD')},						{DoiBroken, 'DOI', 'err_doibroken_missing_doi', A:ORIGIN ('DoiBroken')},		{Embargo, 'PMC', 'err_embargo_missing_pmc', A:ORIGIN ('Embargo')},		}	ID_list, ID_list_coins = identifiers.identifier_lists_get (args, {DoiBroken = DoiBroken, ASINTLD = A['ASINTLD'], Embargo = Embargo, Class = Class, Year=anchor_year}, ID_support);	-- Account for the oddities that are {{cite arxiv}}, {{cite biorxiv}}, {{cite citeseerx}}, {{cite medrxiv}}, {{cite ssrn}}, before generation of COinS data.	if utilities.in_array (config.CitationClass, whitelist.preprint_template_list_t) then	-- |arxiv= or |eprint= required for cite arxiv; |biorxiv=, |citeseerx=, |medrxiv=, |ssrn= required for their templates		if not (args[cfg.id_handlers[config.CitationClass:upper()].parameters[1]] or 		-- can't use ID_list_coins k/v table here because invalid parameters omitted			args[cfg.id_handlers[config.CitationClass:upper()].parameters[2]]) then			-- which causes unexpected parameter missing error message				utilities.set_message ('err_' .. config.CitationClass .. '_missing');		-- add error message		end		Periodical = ({['arxiv'] = 'arXiv', ['biorxiv'] = 'bioRxiv', ['citeseerx'] = 'CiteSeerX', ['medrxiv'] = 'medRxiv', ['ssrn'] = 'Social Science Research Network'})[config.CitationClass];	end	-- Link the title of the work if no |url= was provided, but we have a |pmc= or a |doi= with |doi-access=free	if config.CitationClass == "journal" and not utilities.is_set (URL) and not utilities.is_set (TitleLink) and not utilities.in_array (cfg.keywords_xlate[Title], {'off', 'none'}) then -- TODO: remove 'none' once existing citations have been switched to 'off', so 'none' can be used as token for "no title" instead		if 'none' ~= cfg.keywords_xlate[auto_select] then						-- if auto-linking not disabled 	 		if identifiers.auto_link_urls[auto_select] then						-- manual selection		 		URL = identifiers.auto_link_urls[auto_select];					-- set URL to be the same as identifier's external link 				URL_origin = cfg.id_handlers[auto_select:upper()].parameters[1];	-- set URL_origin to parameter name for use in error message if citation is missing a |title=			elseif identifiers.auto_link_urls['pmc'] then						-- auto-select PMC				URL = identifiers.auto_link_urls['pmc'];						-- set URL to be the same as the PMC external link if not embargoed				URL_origin = cfg.id_handlers['PMC'].parameters[1];				-- set URL_origin to parameter name for use in error message if citation is missing a |title=			elseif identifiers.auto_link_urls['doi'] then						-- auto-select DOI				URL = identifiers.auto_link_urls['doi'];				URL_origin = cfg.id_handlers['DOI'].parameters[1];			end 	 	end		if utilities.is_set (URL) then											-- set when using an identifier-created URL			if utilities.is_set (AccessDate) then								-- |access-date= requires |url=; identifier-created URL is not |url=				utilities.set_message ('err_accessdate_missing_url');			-- add an error message				AccessDate = '';												-- unset			end			if utilities.is_set (ArchiveURL) then								-- |archive-url= requires |url=; identifier-created URL is not |url=				utilities.set_message ('err_archive_missing_url');				-- add an error message				ArchiveURL = '';												-- unset			end		end	end	-- At this point fields may be nil if they weren't specified in the template use.  We can use that fact.	-- Test if citation has no title	if	not utilities.is_set (Title) and not utilities.is_set (TransTitle) and not utilities.is_set (ScriptTitle) then	-- has special case for cite episode		utilities.set_message ('err_citation_missing_title', {'episode' == config.CitationClass and 'series' or 'title'});	end	if utilities.in_array (cfg.keywords_xlate[Title], {'off', 'none'}) and			utilities.in_array (config.CitationClass, {'journal', 'citation'}) and			(utilities.is_set (Periodical) or utilities.is_set (ScriptPeriodical)) and			('journal' == Periodical_origin or 'script-journal' == ScriptPeriodical_origin) then	-- special case for journal cites				Title = '';														-- set title to empty string				utilities.set_message ('maint_untitled');						-- add maint cat	end	-- COinS metadata (see <http://ocoins.info/>) for automated parsing of citation information.	-- handle the oddity that is cite encyclopedia and {{citation |encyclopedia=something}}. Here we presume that	-- when Periodical, Title, and Chapter are all set, then Periodical is the book (encyclopedia) title, Title	-- is the article title, and Chapter is a section within the article.  So, we remap 		local coins_chapter = Chapter;												-- default assuming that remapping not required	local coins_title = Title;													-- et tu	if 'encyclopaedia' == config.CitationClass or ('citation' == config.CitationClass and utilities.is_set (Encyclopedia)) then		if utilities.is_set (Chapter) and utilities.is_set (Title) and utilities.is_set (Periodical) then		-- if all are used then			coins_chapter = Title;												-- remap			coins_title = Periodical;		end	end	local coins_author = a;														-- default for coins rft.au 	if 0 < #c then																-- but if contributor list		coins_author = c;														-- use that instead	end		-- this is the function call to COinS()	local OCinSoutput = metadata.COinS({		['Periodical'] = utilities.strip_apostrophe_markup (Periodical),		-- no markup in the metadata		['Encyclopedia'] = Encyclopedia,										-- just a flag; content ignored by ~/COinS		['Chapter'] = metadata.make_coins_title (coins_chapter, ScriptChapter),	-- Chapter and ScriptChapter stripped of bold / italic / accept-as-written markup		['Degree'] = Degree;													-- cite thesis only		['Title'] = metadata.make_coins_title (coins_title, ScriptTitle),		-- Title and ScriptTitle stripped of bold / italic / accept-as-written markup		['PublicationPlace'] = PublicationPlace,		['Date'] = COinS_date.rftdate,											-- COinS_date.* has correctly formatted date values if Date is valid;		['Season'] = COinS_date.rftssn,		['Quarter'] = COinS_date.rftquarter,		['Chron'] =  COinS_date.rftchron,		['Series'] = Series,		['Volume'] = Volume,		['Issue'] = Issue,		['ArticleNumber'] = ArticleNumber,		['Pages'] = coins_pages or metadata.get_coins_pages (first_set ({Sheet, Sheets, Page, Pages, At, QuotePage, QuotePages}, 7)),	-- pages stripped of external links		['Edition'] = Edition,		['PublisherName'] = PublisherName or Newsgroup,							-- any apostrophe markup already removed from PublisherName		['URL'] = first_set ({ChapterURL, URL}, 2),		['Authors'] = coins_author,		['ID_list'] = ID_list_coins,		['RawPage'] = this_page.prefixedText,	}, config.CitationClass);	-- Account for the oddities that are {{cite arxiv}}, {{cite biorxiv}}, {{cite citeseerx}}, {{cite medrxiv}}, and {{cite ssrn}} AFTER generation of COinS data.	if utilities.in_array (config.CitationClass, whitelist.preprint_template_list_t) then	-- we have set rft.jtitle in COinS to arXiv, bioRxiv, CiteSeerX, medRxiv, or ssrn now unset so it isn't displayed		Periodical = '';														-- periodical not allowed in these templates; if article has been published, use cite journal	end	-- special case for cite newsgroup.  Do this after COinS because we are modifying Publishername to include some static text	if 'newsgroup' == config.CitationClass and utilities.is_set (Newsgroup) then		PublisherName = utilities.substitute (cfg.messages['newsgroup'], external_link( 'news:' .. Newsgroup, Newsgroup, Newsgroup_origin, nil ));	end	local Editors;	local EditorCount;															-- used only for choosing {ed.) or (eds.) annotation at end of editor name-list	local Contributors;															-- assembled contributors name list	local contributor_etal;	local Translators;															-- assembled translators name list	local translator_etal;	local t = {};																-- translators list from |translator-lastn= / translator-firstn= pairs	t = extract_names (args, 'TranslatorList');									-- fetch translator list from |translatorn= / |translator-lastn=, -firstn=, -linkn=, -maskn=	local Interviewers;																local interviewers_list = {};						interviewers_list = extract_names (args, 'InterviewerList');				-- process preferred interviewers parameters	local interviewer_etal;		-- Now perform various field substitutions.	-- We also add leading spaces and surrounding markup and punctuation to the	-- various parts of the citation, but only when they are non-nil.	do		local last_first_list;		local control = { 			format = NameListStyle,												-- empty string, '&', 'amp', 'and', or 'vanc'			maximum = nil,														-- as if display-authors or display-editors not set			mode = Mode		};		do																		-- do editor name list first because the now unsupported coauthors used to modify control table			local display_names, param = display_names_select (cfg.global_cs1_config_t['DisplayEditors'], A['DisplayEditors'], A:ORIGIN ('DisplayEditors'), #e);			control.maximum, editor_etal = get_display_names (display_names, #e, 'editors', editor_etal, param);			Editors, EditorCount = list_people (control, e, editor_etal);			if 1 == EditorCount and (true == editor_etal or 1 < #e) then		-- only one editor displayed but includes etal then 				EditorCount = 2;												-- spoof to display (eds.) annotation			end		end		do																		-- now do interviewers			local display_names, param = display_names_select (cfg.global_cs1_config_t['DisplayInterviewers'], A['DisplayInterviewers'], A:ORIGIN ('DisplayInterviewers'), #interviewers_list);			control.maximum, interviewer_etal = get_display_names (display_names, #interviewers_list, 'interviewers', interviewer_etal, param);			Interviewers = list_people (control, interviewers_list, interviewer_etal);		end		do																		-- now do translators			local display_names, param = display_names_select (cfg.global_cs1_config_t['DisplayTranslators'], A['DisplayTranslators'], A:ORIGIN ('DisplayTranslators'), #t);			control.maximum, translator_etal = get_display_names (display_names, #t, 'translators', translator_etal, param);			Translators = list_people (control, t, translator_etal);		end		do																		-- now do contributors			local display_names, param = display_names_select (cfg.global_cs1_config_t['DisplayContributors'], A['DisplayContributors'], A:ORIGIN ('DisplayContributors'), #c);			control.maximum, contributor_etal = get_display_names (display_names, #c, 'contributors', contributor_etal, param);			Contributors = list_people (control, c, contributor_etal);		end		do																		-- now do authors			local display_names, param = display_names_select (cfg.global_cs1_config_t['DisplayAuthors'], A['DisplayAuthors'], A:ORIGIN ('DisplayAuthors'), #a, author_etal);			control.maximum, author_etal = get_display_names (display_names, #a, 'authors', author_etal, param);			last_first_list = list_people (control, a, author_etal);			if utilities.is_set (Authors) then				Authors, author_etal = name_has_etal (Authors, author_etal, false, 'authors');	-- find and remove variations on et al.				if author_etal then					Authors = Authors .. ' ' .. cfg.messages['et al'];			-- add et al. to authors parameter				end			else				Authors = last_first_list;										-- either an author name list or an empty string			end		end																		-- end of do			if utilities.is_set (Authors) and utilities.is_set (Collaboration) then			Authors = Authors .. ' (' .. Collaboration .. ')';					-- add collaboration after et al.		end	end	local ConferenceFormat = A['ConferenceFormat'];	local ConferenceURL = A['ConferenceURL'];	ConferenceFormat = style_format (ConferenceFormat, ConferenceURL, 'conference-format', 'conference-url');	Format = style_format (Format, URL, 'format', 'url');	-- special case for chapter format so no error message or cat when chapter not supported	if not (utilities.in_array (config.CitationClass, {'web', 'news', 'journal', 'magazine', 'pressrelease', 'podcast', 'newsgroup', 'arxiv', 'biorxiv', 'citeseerx', 'medrxiv', 'ssrn'}) or		('citation' == config.CitationClass and (utilities.is_set (Periodical) or utilities.is_set (ScriptPeriodical)) and not utilities.is_set (Encyclopedia))) then			ChapterFormat = style_format (ChapterFormat, ChapterURL, 'chapter-format', 'chapter-url');	end	if not utilities.is_set (URL) then		if utilities.in_array (config.CitationClass, {"web", "podcast", "mailinglist"}) or		-- |url= required for cite web, cite podcast, and cite mailinglist			('citation' == config.CitationClass and ('website' == Periodical_origin or 'script-website' == ScriptPeriodical_origin)) then	-- and required for {{citation}} with |website= or |script-website=				utilities.set_message ('err_cite_web_url');		end				-- do we have |accessdate= without either |url= or |chapter-url=?		if utilities.is_set (AccessDate) and not utilities.is_set (ChapterURL) then		-- ChapterURL may be set when URL is not set;			utilities.set_message ('err_accessdate_missing_url');			AccessDate = '';		end	end	local UrlStatus = is_valid_parameter_value (A['UrlStatus'], A:ORIGIN('UrlStatus'), cfg.keywords_lists['url-status'], '');	local OriginalURL	local OriginalURL_origin	local OriginalFormat	local OriginalAccess;	UrlStatus = UrlStatus:lower();												-- used later when assembling archived text	if utilities.is_set ( ArchiveURL ) then		if utilities.is_set (ChapterURL) then 									-- if chapter-url= is set apply archive url to it			OriginalURL = ChapterURL;											-- save copy of source chapter's url for archive text			OriginalURL_origin = ChapterURL_origin;								-- name of |chapter-url= parameter for error messages			OriginalFormat = ChapterFormat;										-- and original |chapter-format=			if 'live' ~= UrlStatus then				ChapterURL = ArchiveURL											-- swap-in the archive's URL				ChapterURL_origin = A:ORIGIN('ArchiveURL')						-- name of |archive-url= parameter for error messages				ChapterFormat = ArchiveFormat or '';							-- swap in archive's format				ChapterUrlAccess = nil;											-- restricted access levels do not make sense for archived URLs			end		elseif utilities.is_set (URL) then			OriginalURL = URL;													-- save copy of original source URL			OriginalURL_origin = URL_origin;									-- name of URL parameter for error messages			OriginalFormat = Format; 											-- and original |format=			OriginalAccess = UrlAccess;			if 'live' ~= UrlStatus then											-- if URL set then |archive-url= applies to it				URL = ArchiveURL												-- swap-in the archive's URL				URL_origin = A:ORIGIN('ArchiveURL')								-- name of archive URL parameter for error messages				Format = ArchiveFormat or '';									-- swap in archive's format				UrlAccess = nil;												-- restricted access levels do not make sense for archived URLs			end		end	elseif utilities.is_set (UrlStatus) then									-- if |url-status= is set when |archive-url= is not set 		-- utilities.set_message ('maint_url_status');								-- add maint cat	end	if utilities.in_array (config.CitationClass, {'web', 'news', 'journal', 'magazine', 'pressrelease', 'podcast', 'newsgroup', 'arxiv', 'biorxiv', 'citeseerx', 'medrxiv', 'ssrn'}) or	-- if any of the 'periodical' cites except encyclopedia		('citation' == config.CitationClass and (utilities.is_set (Periodical) or utilities.is_set (ScriptPeriodical)) and not utilities.is_set (Encyclopedia)) then			local chap_param;			if utilities.is_set (Chapter) then									-- get a parameter name from one of these chapter related meta-parameters				chap_param = A:ORIGIN ('Chapter')			elseif utilities.is_set (TransChapter) then				chap_param = A:ORIGIN ('TransChapter')			elseif utilities.is_set (ChapterURL) then				chap_param = A:ORIGIN ('ChapterURL')			elseif utilities.is_set (ScriptChapter) then				chap_param = ScriptChapter_origin;			else utilities.is_set (ChapterFormat)				chap_param = A:ORIGIN ('ChapterFormat')			end			if utilities.is_set (chap_param) then								-- if we found one				utilities.set_message ('err_chapter_ignored', {chap_param});	-- add error message				Chapter = '';													-- and set them to empty string to be safe with concatenation				TransChapter = '';				ChapterURL = '';				ScriptChapter = '';				ChapterFormat = '';			end	else																		-- otherwise, format chapter / article title		local no_quotes = false;												-- default assume that we will be quoting the chapter parameter value		if utilities.is_set (Contribution) and 0 < #c then						-- if this is a contribution with contributor(s)			if utilities.in_array (Contribution:lower(), cfg.keywords_lists.contribution) then	-- and a generic contribution title				no_quotes = true;												-- then render it unquoted			end		end		Chapter = format_chapter_title (ScriptChapter, ScriptChapter_origin, Chapter, Chapter_origin, TransChapter, TransChapter_origin, ChapterURL, ChapterURL_origin, no_quotes, ChapterUrlAccess);		-- Contribution is also in Chapter		if utilities.is_set (Chapter) then			Chapter = Chapter .. ChapterFormat ;			if 'map' == config.CitationClass and utilities.is_set (TitleType) then				Chapter = Chapter .. ' ' .. TitleType;							-- map annotation here; not after title			end			Chapter = Chapter .. sepc .. ' ';		elseif utilities.is_set (ChapterFormat) then							-- |chapter= not set but |chapter-format= is so ...			Chapter = ChapterFormat .. sepc .. ' ';								-- ... ChapterFormat has error message, we want to see it		end	end	-- Format main title	local plain_title = false;	local accept_title;	Title, accept_title = utilities.has_accept_as_written (Title, true);		-- remove accept-this-as-written markup when it wraps all of <Title>	if accept_title and ('' == Title) then										-- only support forced empty for now "(())"		Title = cfg.messages['notitle'];										-- replace by predefined "No title" message			-- TODO: utilities.set_message ( 'err_redundant_parameters', ...);	-- issue proper error message instead of muting	 			ScriptTitle = '';													-- just mute for now	 			TransTitle = '';													-- just mute for now 		plain_title = true;														-- suppress text decoration for descriptive title		utilities.set_message ('maint_untitled');								-- add maint cat	end	if not accept_title then													-- <Title> not wrapped in accept-as-written markup		if '...' == Title:sub (-3) then											-- if ellipsis is the last three characters of |title=			Title = Title:gsub ('(%.%.%.)%.+$', '%1');							-- limit the number of dots to three		elseif not mw.ustring.find (Title, '%.%s*%a%.$') and					-- end of title is not a 'dot-(optional space-)letter-dot' initialism ...			not mw.ustring.find (Title, '%s+%a%.$') then						-- ...and not a 'space-letter-dot' initial (''Allium canadense'' L.)				Title = mw.ustring.gsub(Title, '%' .. sepc .. '$', '');			-- remove any trailing separator character; sepc and ms.ustring() here for languages that use multibyte separator characters		end		if utilities.is_set (ArchiveURL) and is_archived_copy (Title) then			utilities.set_message ('maint_archived_copy');						-- add maintenance category before we modify the content of Title		end		if is_generic ('generic_titles', Title) then			utilities.set_message ('err_generic_title');						-- set an error message		end	end	if (not plain_title) and (utilities.in_array (config.CitationClass, {'web', 'news', 'journal', 'magazine', 'document', 'pressrelease', 'podcast', 'newsgroup', 'mailinglist', 'interview', 'arxiv', 'biorxiv', 'citeseerx', 'medrxiv', 'ssrn'}) or		('citation' == config.CitationClass and (utilities.is_set (Periodical) or utilities.is_set (ScriptPeriodical)) and not utilities.is_set (Encyclopedia)) or		('map' == config.CitationClass and (utilities.is_set (Periodical) or utilities.is_set (ScriptPeriodical)))) then		-- special case for cite map when the map is in a periodical treat as an article			Title = kern_quotes (Title);										-- if necessary, separate title's leading and trailing quote marks from module provided quote marks			Title = utilities.wrap_style ('quoted-title', Title);			Title = script_concatenate (Title, ScriptTitle, 'script-title');	-- <bdi> tags, lang attribute, categorization, etc.; must be done after title is wrapped			TransTitle = utilities.wrap_style ('trans-quoted-title', TransTitle );	elseif plain_title or ('report' == config.CitationClass) then				-- no styling for cite report and descriptive titles (otherwise same as above)		Title = script_concatenate (Title, ScriptTitle, 'script-title');		-- <bdi> tags, lang attribute, categorization, etc.; must be done after title is wrapped		TransTitle = utilities.wrap_style ('trans-quoted-title', TransTitle );	-- for cite report, use this form for trans-title	else		Title = utilities.wrap_style ('italic-title', Title);		Title = script_concatenate (Title, ScriptTitle, 'script-title');		-- <bdi> tags, lang attribute, categorization, etc.; must be done after title is wrapped		TransTitle = utilities.wrap_style ('trans-italic-title', TransTitle);	end	if utilities.is_set (TransTitle) then		if utilities.is_set (Title) then			TransTitle = " " .. TransTitle;		else			utilities.set_message ('err_trans_missing_title', {'title'});		end	end	if utilities.is_set (Title) then											-- TODO: is this the right place to be making Wikisource URLs?		if utilities.is_set (TitleLink) and utilities.is_set (URL) then			utilities.set_message ('err_wikilink_in_url');						-- set an error message because we can't have both			TitleLink = '';														-- unset		end			if not utilities.is_set (TitleLink) and utilities.is_set (URL) then			Title = external_link (URL, Title, URL_origin, UrlAccess) .. TransTitle .. Format;			URL = '';															-- unset these because no longer needed			Format = "";		elseif utilities.is_set (TitleLink) and not utilities.is_set (URL) then			local ws_url;			ws_url = wikisource_url_make (TitleLink);							-- ignore ws_label return; not used here			if ws_url then				Title = external_link (ws_url, Title .. '&nbsp;', 'ws link in title-link');	-- space char after Title to move icon away from italic text; TODO: a better way to do this?				Title = utilities.substitute (cfg.presentation['interwiki-icon'], {cfg.presentation['class-wikisource'], TitleLink, Title});								Title = Title .. TransTitle;			else				Title = utilities.make_wikilink (TitleLink, Title) .. TransTitle;			end		else			local ws_url, ws_label, L;											-- Title has italic or quote markup by the time we get here which causes is_wikilink() to return 0 (not a wikilink)			ws_url, ws_label, L = wikisource_url_make (Title:gsub('^[\'"]*(.-)[\'"]*$', '%1'));	-- make ws URL from |title= interwiki link (strip italic or quote markup); link portion L becomes tooltip label			if ws_url then				Title = Title:gsub ('%b[]', ws_label);							-- replace interwiki link with ws_label to retain markup				Title = external_link (ws_url, Title .. '&nbsp;', 'ws link in title');	-- space char after Title to move icon away from italic text; TODO: a better way to do this?				Title = utilities.substitute (cfg.presentation['interwiki-icon'], {cfg.presentation['class-wikisource'], L, Title});								Title = Title .. TransTitle;			else				Title = Title .. TransTitle;			end		end	else		Title = TransTitle;	end	if utilities.is_set (Place) then		Place = " " .. wrap_msg ('written', Place, use_lowercase) .. sepc .. " ";	end	local ConferenceURL_origin = A:ORIGIN('ConferenceURL');						-- get name of parameter that holds ConferenceURL	if utilities.is_set (Conference) then		if utilities.is_set (ConferenceURL) then			Conference = external_link( ConferenceURL, Conference, ConferenceURL_origin, nil );		end		Conference = sepc .. " " .. Conference .. ConferenceFormat;	elseif utilities.is_set (ConferenceURL) then		Conference = sepc .. " " .. external_link( ConferenceURL, nil, ConferenceURL_origin, nil );	end	local Position = '';	if not utilities.is_set (Position) then		local Minutes = A['Minutes'];		local Time = A['Time'];		if utilities.is_set (Minutes) then			if utilities.is_set (Time) then		--TODO: make a function for this and similar?				utilities.set_message ('err_redundant_parameters', {utilities.wrap_style ('parameter', 'minutes') .. cfg.presentation['sep_list_pair'] .. utilities.wrap_style ('parameter', 'time')});			end			Position = " " .. Minutes .. " " .. cfg.messages['minutes'];		else			if utilities.is_set (Time) then				local TimeCaption = A['TimeCaption']				if not utilities.is_set (TimeCaption) then					TimeCaption = cfg.messages['event'];					if sepc ~= '.' then						TimeCaption = TimeCaption:lower();					end				end				Position = " " .. TimeCaption .. " " .. Time;			end		end	else		Position = " " .. Position;		At = '';	end	Page, Pages, Sheet, Sheets = format_pages_sheets (Page, Pages, Sheet, Sheets, config.CitationClass, Periodical_origin, sepc, NoPP, use_lowercase);	At = utilities.is_set (At) and (sepc .. " " .. At) or "";	Position = utilities.is_set (Position) and (sepc .. " " .. Position) or "";	if config.CitationClass == 'map' then		local Sections = A['Sections'];											-- Section (singular) is an alias of Chapter so set earlier		local Inset = A['Inset'];				if utilities.is_set ( Inset ) then			Inset = sepc .. " " .. wrap_msg ('inset', Inset, use_lowercase);		end					if utilities.is_set ( Sections ) then			Section = sepc .. " " .. wrap_msg ('sections', Sections, use_lowercase);		elseif utilities.is_set ( Section ) then			Section = sepc .. " " .. wrap_msg ('section', Section, use_lowercase);		end		At = At .. Inset .. Section;			end		local Others = A['Others'];	if utilities.is_set (Others) and 0 == #a and 0 == #e then					-- add maint cat when |others= has value and used without |author=, |editor=		if config.CitationClass == "AV-media-notes"		or config.CitationClass == "audio-visual" then							-- special maint for AV/M which has a lot of 'false' positives right now			utilities.set_message ('maint_others_avm')		else			utilities.set_message ('maint_others');		end	end	Others = utilities.is_set (Others) and (sepc .. " " .. Others) or "";		if utilities.is_set (Translators) then		Others = safe_join ({sepc .. ' ', wrap_msg ('translated', Translators, use_lowercase), Others}, sepc);	end	if utilities.is_set (Interviewers) then		Others = safe_join ({sepc .. ' ', wrap_msg ('interview', Interviewers, use_lowercase), Others}, sepc);	end		local TitleNote = A['TitleNote'];	TitleNote = utilities.is_set (TitleNote) and (sepc .. " " .. TitleNote) or "";	if utilities.is_set (Edition) then		if Edition:match ('%f[%a][Ee]d%n?%.?$') or Edition:match ('%f[%a][Ee]dition$') then -- Ed, ed, Ed., ed., Edn, edn, Edn., edn.			utilities.set_message ('err_extra_text_edition');					 -- add error message		end		Edition = " " .. wrap_msg ('edition', vi_formatedition(Edition));	else		Edition = '';	end	Series = utilities.is_set (Series) and wrap_msg ('series', {sepc, Series}) or "";	-- not the same as SeriesNum	local Agency = A['Agency'] or '';											-- |agency= is supported by {{cite magazine}}, {{cite news}}, {{cite press release}}, {{cite web}}, and certain {{citation}} templates	if utilities.is_set (Agency) then											-- this testing done here because {{citation}} supports 'news' citations		if utilities.in_array (config.CitationClass, {'magazine', 'news', 'pressrelease', 'web'}) or ('citation' == config.CitationClass and utilities.in_array (Periodical_origin, {"magazine", "newspaper", "work"})) then			Agency = wrap_msg ('agency', {sepc, Agency});						-- format for rendering		else			Agency = '';														-- unset; not supported			utilities.set_message ('err_parameter_ignored', {'agency'});		-- add error message		end	end		Volume = format_volume_issue (Volume, Issue, ArticleNumber, config.CitationClass, Periodical_origin, sepc, use_lowercase);	if utilities.is_set (AccessDate) then		local retrv_text = " " .. cfg.messages['retrieved']				AccessDate = vi_formatdate(AccessDate, true);		AccessDate = nowrap_date (AccessDate);									-- wrap in nowrap span if date in appropriate format		if (sepc ~= ".") then retrv_text = retrv_text:lower() end				-- if mode is cs2, lower case		AccessDate = utilities.substitute (retrv_text, AccessDate);				-- add retrieved text		AccessDate = utilities.substitute (cfg.presentation['accessdate'], {sepc, AccessDate});	-- allow editors to hide accessdates	end		if utilities.is_set (ID) then ID = sepc .. " " .. ID; end		local Docket = A['Docket'];   	if "thesis" == config.CitationClass and utilities.is_set (Docket) then		ID = sepc .. " Docket " .. Docket .. ID;	end   	if "report" == config.CitationClass and utilities.is_set (Docket) then		-- for cite report when |docket= is set		ID = sepc .. ' ' .. Docket;												-- overwrite ID even if |id= is set	end	if utilities.is_set (URL) then		URL = " " .. external_link( URL, nil, URL_origin, UrlAccess );	end		-- We check length of PostScript here because it will have been nuked by	-- the quote parameters. We'd otherwise emit a message even if there wasn't	-- a displayed postscript.	-- TODO: Should the max size (1) be configurable?	-- TODO: Should we check a specific pattern?	if utilities.is_set(PostScript) and mw.ustring.len(PostScript) > 1 then		utilities.set_message ('maint_postscript')	end		local Archived;	if utilities.is_set (ArchiveURL) then		if not utilities.is_set (ArchiveDate) then								-- ArchiveURL set but ArchiveDate not set			utilities.set_message ('err_archive_missing_date');					-- emit an error message			ArchiveURL = '';													-- empty string for concatenation			ArchiveDate = '';													-- empty string for concatenation		end	else																if utilities.is_set (ArchiveDate) then									-- ArchiveURL not set but ArchiveDate is set			utilities.set_message ('err_archive_date_missing_url');				-- emit an error message			ArchiveURL = '';													-- empty string for concatenation			ArchiveDate = '';													-- empty string for concatenation		end	end		ArchiveDate = vi_formatdate(ArchiveDate, true)	if utilities.is_set (ArchiveURL) then		local arch_text;		if "live" == UrlStatus then			arch_text = cfg.messages['archived'];			if sepc ~= "." then arch_text = arch_text:lower() end			if utilities.is_set (ArchiveDate) then				Archived = sepc .. ' ' .. utilities.substitute ( cfg.messages['archived-live'],					{external_link( ArchiveURL, arch_text, A:ORIGIN('ArchiveURL'), nil) .. ArchiveFormat, ArchiveDate } );			else				Archived = '';			end			if not utilities.is_set (OriginalURL) then				utilities.set_message ('err_archive_missing_url');				Archived = '';													-- empty string for concatenation			end		elseif utilities.is_set (OriginalURL) then								-- UrlStatus is empty, 'dead', 'unfit', 'usurped', 'bot: unknown'			if utilities.in_array (UrlStatus, {'unfit', 'usurped', 'bot: unknown'}) then				arch_text = cfg.messages['archived-unfit'];				if sepc ~= "." then arch_text = arch_text:lower() end				Archived = sepc .. ' ' .. arch_text .. ArchiveDate;				-- format already styled				if 'bot: unknown' == UrlStatus then					utilities.set_message ('maint_bot_unknown');				-- and add a category if not already added				else					utilities.add_prop_cat ('unfit');							-- and add a category if not already added				end			else																-- UrlStatus is empty, 'dead'				arch_text = cfg.messages['archived-dead'];				if sepc ~= "." then arch_text = arch_text:lower() end				if utilities.is_set (ArchiveDate) then					Archived = sepc .. " " .. utilities.substitute ( arch_text,						{ external_link( OriginalURL, cfg.messages['original'], OriginalURL_origin, OriginalAccess ) .. OriginalFormat, ArchiveDate } );	-- format already styled				else					Archived = '';												-- unset for concatenation				end			end			else																	-- OriginalUrl not set			utilities.set_message ('err_archive_missing_url');			Archived = '';														-- empty string for concatenation		end	elseif utilities.is_set (ArchiveFormat) then		Archived = ArchiveFormat;												-- if set and ArchiveURL not set ArchiveFormat has error message	else		Archived = '';	end		local TranscriptURL = A['TranscriptURL']	local TranscriptFormat = A['TranscriptFormat'];	TranscriptFormat = style_format (TranscriptFormat, TranscriptURL, 'transcript-format', 'transcripturl');	local Transcript = A['Transcript'];	local TranscriptURL_origin = A:ORIGIN('TranscriptURL');						-- get name of parameter that holds TranscriptURL	if utilities.is_set (Transcript) then		if utilities.is_set (TranscriptURL) then			Transcript = external_link( TranscriptURL, Transcript, TranscriptURL_origin, nil );		end		Transcript = sepc .. ' ' .. Transcript .. TranscriptFormat;	elseif utilities.is_set (TranscriptURL) then		Transcript = external_link( TranscriptURL, nil, TranscriptURL_origin, nil );	end	local Publisher;	if utilities.is_set (PublicationDate) then		PublicationDate = wrap_msg ('published', vi_formatdate(PublicationDate, true));	end	if utilities.is_set (PublisherName) then		if utilities.is_set (PublicationPlace) then			Publisher = sepc .. " " .. PublicationPlace .. ": " .. PublisherName .. PublicationDate;		else			Publisher = sepc .. " " .. PublisherName .. PublicationDate;  		end				elseif utilities.is_set (PublicationPlace) then 		Publisher= sepc .. " " .. PublicationPlace .. PublicationDate;	else 		Publisher = PublicationDate;	end		-- Several of the above rely upon detecting this as nil, so do it last.	if (utilities.is_set (Periodical) or utilities.is_set (ScriptPeriodical) or utilities.is_set (TransPeriodical)) then		if utilities.is_set (Title) or utilities.is_set (TitleNote) then 			Periodical = sepc .. " " .. format_periodical (ScriptPeriodical, ScriptPeriodical_origin, Periodical, TransPeriodical, TransPeriodical_origin);		else 			Periodical = format_periodical (ScriptPeriodical, ScriptPeriodical_origin, Periodical, TransPeriodical, TransPeriodical_origin);		end	end		local Language = A['Language'];	if utilities.is_set (Language) then		Language = language_parameter (Language);								-- format, categories, name from ISO639-1, etc.	else		Language='';															-- language not specified so make sure this is an empty string;	--[[ TODO: need to extract the wrap_msg from language_parameter	so that we can solve parentheses bunching problem with Format/Language/TitleType	]]	end	--[[	Handle the oddity that is cite speech.  This code overrides whatever may be the value assigned to TitleNote (through |department=) and forces it to be " (Speech)" so that	the annotation directly follows the |title= parameter value in the citation rather than the |event= parameter value (if provided).	]]	if "speech" == config.CitationClass then									-- cite speech only		TitleNote = TitleType;													-- move TitleType to TitleNote so that it renders ahead of |event=		TitleType = '';															-- and unset		if utilities.is_set (Periodical) then									-- if Periodical, perhaps because of an included |website= or |journal= parameter 			if utilities.is_set (Conference) then								-- and if |event= is set				Conference = Conference .. sepc .. " ";							-- then add appropriate punctuation to the end of the Conference variable before rendering			end		end	end	-- Piece all bits together at last.  Here, all should be non-nil.	-- We build things this way because it is more efficient in LUA	-- not to keep reassigning to the same string variable over and over.	local tcommon;	local tcommon2;																-- used for book cite when |contributor= is set		if utilities.in_array (config.CitationClass, {"book", "citation"}) and not utilities.is_set (Periodical) then		-- special cases for book cites		if utilities.is_set (Contributors) then									-- when we are citing foreword, preface, introduction, etc.			tcommon = safe_join ({Title, TitleNote}, sepc);						-- author and other stuff will come after this and before tcommon2			tcommon2 = safe_join ({TitleType, Series, Language, Volume, Others, Edition, Publisher}, sepc);		else			tcommon = safe_join ({Title, TitleNote, TitleType, Series, Language, Volume, Others, Edition, Publisher}, sepc);		end	elseif 'map' == config.CitationClass then									-- special cases for cite map		if utilities.is_set (Chapter) then										-- map in a book; TitleType is part of Chapter			tcommon = safe_join ({Title, Edition, Scale, Series, Language, Cartography, Others, Publisher, Volume}, sepc);		elseif utilities.is_set (Periodical) then								-- map in a periodical			tcommon = safe_join ({Title, TitleType, Periodical, Scale, Series, Language, Cartography, Others, Publisher, Volume}, sepc);		else																	-- a sheet or stand-alone map			tcommon = safe_join ({Title, TitleType, Edition, Scale, Series, Language, Cartography, Others, Publisher}, sepc);		end			elseif 'episode' == config.CitationClass then								-- special case for cite episode		tcommon = safe_join ({Title, TitleNote, TitleType, Series, Language, Edition, Publisher}, sepc);	else																		-- all other CS1 templates		tcommon = safe_join ({Title, TitleNote, Conference, Periodical, TitleType, Series, Language, Volume, Others, Edition, Publisher, Agency}, sepc);	end		if #ID_list > 0 then		ID_list = safe_join( { sepc .. " ",  table.concat( ID_list, sepc .. " " ), ID }, sepc );	else		ID_list = ID;	end		local Via = A['Via'];	Via = utilities.is_set (Via) and  wrap_msg ('via', Via) or '';	local idcommon;	if 'audio-visual' == config.CitationClass or 'episode' == config.CitationClass then	-- special case for cite AV media & cite episode position transcript		idcommon = safe_join( { ID_list, URL, Archived, Transcript, AccessDate, Via, Quote }, sepc );	else		idcommon = safe_join( { ID_list, URL, Archived, AccessDate, Via, Quote }, sepc );	end		local text;	local pgtext = Position .. Sheet .. Sheets .. Page .. Pages .. At;	local OrigDate = A['OrigDate'];	OrigDate = utilities.is_set (OrigDate) and wrap_msg ('origdate', vi_formatdate(OrigDate, true)) or '';	if utilities.is_set (Date) then		if utilities.is_set (Authors) or utilities.is_set (Editors) then		-- date follows authors or editors when authors not set			Date = " (" .. Date .. ")" .. OrigDate .. sepc .. " ";				-- in parentheses		else																	-- neither of authors and editors set			if (string.sub(tcommon, -1, -1) == sepc) then						-- if the last character of tcommon is sepc				Date = " " .. Date .. OrigDate;									-- Date does not begin with sepc			else				Date = sepc .. " " .. Date .. OrigDate;							-- Date begins with sepc			end		end	end		if utilities.is_set (Authors) then		if (not utilities.is_set (Date)) then									-- when date is set it's in parentheses; no Authors termination			Authors = terminate_name_list (Authors, sepc);						-- when no date, terminate with 0 or 1 sepc and a space		end		if utilities.is_set (Editors) then			local in_text = '';			local post_text = '';			if utilities.is_set (Chapter) and 0 == #c then				in_text = cfg.messages['in'] .. ' ';				if (sepc ~= '.') then					in_text = in_text:lower();									-- lowercase for cs2				end			end			if EditorCount <= 1 then				post_text = ' (' .. cfg.messages['editor'] .. ')';				-- be consistent with no-author, no-date case			else				post_text = ' (' .. cfg.messages['editors'] .. ')';			end			Editors = terminate_name_list (in_text .. Editors .. post_text, sepc);	-- terminate with 0 or 1 sepc and a space		end		if utilities.is_set (Contributors) then									-- book cite and we're citing the intro, preface, etc.			local by_text = sepc .. ' ' .. cfg.messages['by'] .. ' ';			if (sepc ~= '.') then by_text = by_text:lower() end					-- lowercase for cs2			Authors = by_text .. Authors;										-- author follows title so tweak it here			if utilities.is_set (Editors) and utilities.is_set (Date) then		-- when Editors make sure that Authors gets terminated				Authors = terminate_name_list (Authors, sepc);					-- terminate with 0 or 1 sepc and a space			end			if (not utilities.is_set (Date)) then								-- when date is set it's in parentheses; no Contributors termination				Contributors = terminate_name_list (Contributors, sepc);		-- terminate with 0 or 1 sepc and a space			end			text = safe_join( {Contributors, Date, Chapter, tcommon, Authors, Place, Editors, tcommon2, pgtext, idcommon }, sepc );		else			text = safe_join( {Authors, Date, Chapter, Place, Editors, tcommon, pgtext, idcommon }, sepc );		end	elseif utilities.is_set (Editors) then		if utilities.is_set (Date) then			if EditorCount <= 1 then				Editors = Editors .. cfg.presentation['sep_name'] .. cfg.messages['editor'];			else				Editors = Editors .. cfg.presentation['sep_name'] .. cfg.messages['editors'];			end		else			if EditorCount <= 1 then				Editors = Editors .. " (" .. cfg.messages['editor'] .. ")" .. sepc .. " "			else				Editors = Editors .. " (" .. cfg.messages['editors'] .. ")" .. sepc .. " "			end		end		text = safe_join( {Editors, Date, Chapter, Place, tcommon, pgtext, idcommon}, sepc );	else		if utilities.in_array (config.CitationClass, {"journal", "citation"}) and utilities.is_set (Periodical) then			text = safe_join( {Chapter, Place, tcommon, pgtext, Date, idcommon}, sepc );		else			text = safe_join( {Chapter, Place, tcommon, Date, pgtext, idcommon}, sepc );		end	end	if utilities.is_set (PostScript) and PostScript ~= sepc then		text = safe_join( {text, sepc}, sepc ); 								-- Deals with italics, spaces, etc.		if '.' == sepc then														-- remove final seperator if present			text = text:gsub ('%' .. sepc .. '$', '');							-- dot must be escaped here		else			text = mw.ustring.gsub (text, sepc .. '$', '');						-- using ustring for non-dot sepc (likely a non-Latin character)		end	end			text = safe_join( {text, PostScript}, sepc );	-- Now enclose the whole thing in a <cite> element	local options_t = {};	options_t.class = cite_class_attribute_make (config.CitationClass, Mode);	local Ref = is_valid_parameter_value (A['Ref'], A:ORIGIN('Ref'), cfg.keywords_lists['ref'], nil, true);	-- nil when |ref=harv; A['Ref'] else	if 'none' ~= cfg.keywords_xlate[(Ref and Ref:lower()) or ''] then		local namelist_t = {};													-- holds selected contributor, author, editor name list		local year = first_set ({Year, anchor_year}, 2);						-- Year first for legacy citations and for YMD dates that require disambiguation		if #c > 0 then															-- if there is a contributor list			namelist_t = c;														-- select it		elseif #a > 0 then														-- or an author list			namelist_t = a;		elseif #e > 0 then														-- or an editor list			namelist_t = e;		end		local citeref_id;		if #namelist_t > 0 then													-- if there are names in namelist_t			citeref_id = make_citeref_id (namelist_t, year);					-- go make the CITEREF anchor			if mw.uri.anchorEncode (citeref_id) == ((Ref and mw.uri.anchorEncode (Ref)) or '') then	-- Ref may already be encoded (by {{sfnref}}) so citeref_id must be encoded before comparison				utilities.set_message ('maint_ref_duplicates_default');			end		else			citeref_id = '';													-- unset		end		options_t.id = Ref or citeref_id;	end	if string.len (text:gsub('%b<>', '')) <= 2 then								-- remove html and html-like tags; then get length of what remains; 		z.error_cats_t = {};													-- blank the categories list		z.error_msgs_t = {};													-- blank the error messages list		OCinSoutput = nil;														-- blank the metadata string		text = '';																-- blank the the citation		utilities.set_message ('err_empty_citation');							-- set empty citation message and category	end		local render_t = {};														-- here we collect the final bits for concatenation into the rendered citation	if utilities.is_set (options_t.id) then										-- here we wrap the rendered citation in <cite ...>...</cite> tags		table.insert (render_t, utilities.substitute (cfg.presentation['cite-id'], {mw.uri.anchorEncode(options_t.id), mw.text.nowiki(options_t.class), text}));	-- when |ref= is set or when there is a namelist	else		table.insert (render_t, utilities.substitute (cfg.presentation['cite'], {mw.text.nowiki(options_t.class), text}));	-- when |ref=none or when namelist_t empty and |ref= is missing or is empty	end			if OCinSoutput then															-- blanked when citation is 'empty' so don't bother to add boilerplate metadata span		table.insert (render_t, utilities.substitute (cfg.presentation['ocins'], OCinSoutput));	-- format and append metadata to the citation	end	local template_name = ('citation' == config.CitationClass) and 'Chú thích' or 'Chú thích ' .. (cfg.citation_class_map_t[config.CitationClass] or config.CitationClass);	local template_link = '[[Bản mẫu:' .. template_name .. '|' .. template_name .. ']]';	local msg_prefix = '<code class="cs1-code">{{' .. template_link .. '}}</code>: ';	if 0 ~= #z.error_msgs_t then		mw.addWarning (utilities.substitute (cfg.messages.warning_msg_e, template_link));		table.insert (render_t, ' ');											-- insert a space between citation and its error messages		table.sort (z.error_msgs_t);											-- sort the error messages list; sorting includes wrapping <span> and <code> tags; hidden-error sorts ahead of visible-error		local hidden = true;													-- presume that the only error messages emited by this template are hidden		for _, v in ipairs (z.error_msgs_t) do									-- spin through the list of error messages			if v:find ('cs1-visible-error', 1, true) then						-- look for the visible error class name				hidden = false;													-- found one; so don't hide the error message prefix				break;															-- and done because no need to look further			end		end		z.error_msgs_t[1] = table.concat ({utilities.error_comment (msg_prefix, hidden), z.error_msgs_t[1]});	-- add error message prefix to first error message to prevent extraneous punctuation		table.insert (render_t, table.concat (z.error_msgs_t, '; '));			-- make a big string of error messages and add it to the rendering	end	if 0 ~= #z.maint_cats_t then		mw.addWarning (utilities.substitute (cfg.messages.warning_msg_m, template_link));		table.sort (z.maint_cats_t);											-- sort the maintenance messages list		local maint_msgs_t = {};												-- here we collect all of the maint messages		if 0 == #z.error_msgs_t then											-- if no error messages			table.insert (maint_msgs_t, msg_prefix);							-- insert message prefix in maint message livery		end				for _, v in ipairs( z.maint_cats_t ) do									-- append maintenance categories			table.insert (maint_msgs_t, 										-- assemble new maint message and add it to the maint_msgs_t table				table.concat ({v, ' (', utilities.substitute (cfg.messages[':cat wikilink'], v), ')'})				);		end		table.insert (render_t, utilities.substitute (cfg.presentation['hidden-maint'], table.concat (maint_msgs_t, ' ')));	-- wrap the group of maint messages with proper presentation and save	end	if not no_tracking_cats then		local sort_key;		local cat_wikilink = 'cat wikilink';		if cfg.enable_sort_keys then											-- when namespace sort keys enabled			local namespace_number = mw.title.getCurrentTitle().namespace;		-- get namespace number for this wikitext			sort_key = (0 ~= namespace_number and (cfg.name_space_sort_keys[namespace_number] or cfg.name_space_sort_keys.other)) or nil;	-- get sort key character; nil for mainspace			cat_wikilink = (not sort_key and 'cat wikilink') or 'cat wikilink sk';	-- make <cfg.messages> key		end						for _, v in ipairs (z.error_cats_t) do									-- append error categories			table.insert (render_t, utilities.substitute (cfg.messages[cat_wikilink], {v, sort_key}));		end		if cfg.id_limits_data_load_fail then									-- boolean true when load failed			utilities.set_message ('maint_id_limit_load_fail');					-- done here because this maint cat emits no message		end		for _, v in ipairs (z.maint_cats_t) do									-- append maintenance categories			table.insert (render_t, utilities.substitute (cfg.messages[cat_wikilink], {v, sort_key}));		end		for _, v in ipairs (z.prop_cats_t) do									-- append properties categories			table.insert (render_t, utilities.substitute (cfg.messages['cat wikilink'], v));	-- no sort keys		end	end	return table.concat (render_t);												-- make a big string and doneend--[[--------------------------< V A L I D A T E >--------------------------------------------------------------Looks for a parameter's name in one of several whitelists.Parameters in the whitelist can have three values:	true - active, supported parameters	false - deprecated, supported parameters	nil - unsupported parameters	]]local function validate (name, cite_class, empty)	local name = tostring (name);	local enum_name;															-- parameter name with enumerator (if any) replaced with '#'	local state;	local function state_test (state, name)										-- local function to do testing of state values		if true == state then return true; end									-- valid actively supported parameter		if false == state then			if empty then return nil; end										-- empty deprecated parameters are treated as unknowns			deprecated_parameter (name);										-- parameter is deprecated but still supported			return true;		end		if 'tracked' == state then			local base_name = name:gsub ('%d', '');								-- strip enumerators from parameter names that have them to get the base name			utilities.add_prop_cat ('tracked-param', {base_name}, base_name);	-- add a properties category; <base_name> modifies <key>			return true;		end		return nil;	end			if name:find ('#') then														-- # is a cs1|2 reserved character so parameters with # not permitted		return nil;	end																				-- replace enumerator digit(s) with # (|last25= becomes |last#=) (mw.ustring because non-Western 'local' digits)	enum_name = mw.ustring.gsub (name, '%d+$', '#');							-- where enumerator is last charaters in parameter name (these to protect |s2cid=)	enum_name = mw.ustring.gsub (enum_name, '%d+([%-l])', '#%1');				-- where enumerator is in the middle of the parameter name; |author#link= is the oddity	if 'document' == cite_class then											-- special case for {{cite document}}		state = whitelist.document_parameters_t[enum_name];						-- this list holds enumerated and nonenumerated parameters		if true == state_test (state, name) then return true; end				return false;	end	if utilities.in_array (cite_class, whitelist.preprint_template_list_t) then	-- limited parameter sets allowed for these templates		state = whitelist.limited_parameters_t[enum_name];						-- this list holds enumerated and nonenumerated parameters		if true == state_test (state, name) then return true; end		state = whitelist.preprint_arguments_t[cite_class][name];				-- look in the parameter-list for the template identified by cite_class		if true == state_test (state, name) then return true; end		return false;															-- not supported because not found or name is set to nil	end																			-- end limited parameter-set templates	if utilities.in_array (cite_class, whitelist.unique_param_template_list_t) then 	-- template-specific parameters for templates that accept parameters from the basic argument list		state = whitelist.unique_arguments_t[cite_class][name];					-- look in the template-specific parameter-lists for the template identified by cite_class		if true == state_test (state, name) then return true; end	end																			-- if here, fall into general validation	state = whitelist.common_parameters_t[enum_name];							-- all other templates; all normal parameters allowed; this list holds enumerated and nonenumerated parameters	if true == state_test (state, name) then return true; end	return false;																-- not supported because not found or name is set to nilend--[=[-------------------------< I N T E R _ W I K I _ C H E C K >----------------------------------------------check <value> for inter-language interwiki-link markup.  <prefix> must be a MediaWiki-recognized languagecode.  when these values have the form (without leading colon):	[[<prefix>:link|label]] return label as plain-text	[[<prefix>:link]] return <prefix>:link as plain-textreturn value as is else]=]local function inter_wiki_check (parameter, value)	local prefix = value:match ('%[%[(%a+):');									-- get an interwiki prefix if one exists	local _;		if prefix and cfg.inter_wiki_map[prefix:lower()] then						-- if prefix is in the map, needs preceding colon so		utilities.set_message ('err_bad_paramlink', parameter);					-- emit an error message		_, value, _ = utilities.is_wikilink (value);							-- extract label portion from wikilink	end	return value;end--[[--------------------------< M I S S I N G _ P I P E _ C H E C K >------------------------------------------Look at the contents of a parameter. If the content has a string of characters and digits followed by an equalsign, compare the alphanumeric string to the list of cs1|2 parameters.  If found, then the string is possibly aparameter that is missing its pipe.  There are two tests made:	{{cite ... |title=Title access-date=2016-03-17}}	-- the first parameter has a value and whitespace separates that value from the missing pipe parameter name	{{cite ... |title=access-date=2016-03-17}}			-- the first parameter has no value (whitespace after the first = is trimmed by MediaWiki)cs1|2 shares some parameter names with XML/HTML attributes: class=, title=, etc.  To prevent false positives XML/HTMLtags are removed before the search.If a missing pipe is detected, this function adds the missing pipe maintenance category.]]local function missing_pipe_check (parameter, value)	local capture;	value = value:gsub ('%b<>', '');											-- remove XML/HTML tags because attributes: class=, title=, etc.	capture = value:match ('%s+(%a[%w%-]+)%s*=') or value:match ('^(%a[%w%-]+)%s*=');	-- find and categorize parameters with possible missing pipes	if capture and validate (capture) then										-- if the capture is a valid parameter name		utilities.set_message ('err_missing_pipe', parameter);	endend--[[--------------------------< H A S _ E X T R A N E O U S _ P U N C T >--------------------------------------look for extraneous terminal punctuation in most parameter values; parameters listed in skip table are not checked]]local function has_extraneous_punc (param, value)	if 'number' == type (param) then		return;	end		param = param:gsub ('%d+', '#');											-- enumerated name-list mask params allow terminal punct; normalize 	if cfg.punct_skip[param] then		return;																	-- parameter name found in the skip table so done	end		if value:match ('[,;:]$') then		utilities.set_message ('maint_extra_punct');							-- has extraneous punctuation; add maint cat	end	if value:match ('^=') then													-- sometimes an extraneous '=' character appears ...		utilities.set_message ('maint_extra_punct');							-- has extraneous punctuation; add maint cat	endend--[[--------------------------< H A S _ T W L _ U R L >--------------------------------------------------------look for The Wikipedia Library urls in url-holding parameters.  TWL urls are accessible for readers who are notactive extended confirmed Wikipedia editors.  This function emits an error message when such urls are discovered.looks for: '.wikipedialibrary.idm.oclc.org']]local function has_twl_url (url_params_t)	local url_error_t = {};														-- sequence of url-holding parameters that have a TWL url		for param, value in pairs (url_params_t) do		if value:find ('%.wikipedialibrary%.idm%.oclc%.org') then				-- has the TWL base url?			table.insert (url_error_t, utilities.wrap_style ('parameter', param));	-- add parameter name to the list		end	end	if 0 ~= #url_error_t then													-- non-zero when there are errors		table.sort (url_error_t);		utilities.set_message ('err_param_has_twl_url', {utilities.make_sep_list (#url_error_t, url_error_t)});	-- add this error message		return true;	endend--[[--------------------------< H A S _ E X T R A N E O U S _ U R L >------------------------------------------look for extraneous url parameter values; parameters listed in skip table are not checked]]local function has_extraneous_url (non_url_param_t)	local url_error_t = {};		check_for_url (non_url_param_t, url_error_t);									-- extraneous url check	if 0 ~= #url_error_t then													-- non-zero when there are errors		table.sort (url_error_t);		utilities.set_message ('err_param_has_ext_link', {utilities.make_sep_list (#url_error_t, url_error_t)});	-- add this error message	endend--[[--------------------------< _ C I T A T I O N >------------------------------------------------------------Module entry point	frame – from template call (citation()); may be nil when called from another module	args – table of all cs1|2 parameters in the template (the template frame)	config – table of template-supplied parameter (the #invoke frame)]]local function _citation (frame, args, config)									-- save a copy in case we need to display an error message in preview mode	if not frame then		frame = mw.getCurrentFrame();											-- if called from another module, get a frame for frame-provided functions	end																				-- i18n: set the name that your wiki uses to identify sandbox subpages from sandbox template invoke (or can be set here)	local sandbox = ((config.SandboxPath and '' ~= config.SandboxPath) and config.SandboxPath) or '/sandbox';	-- sandbox path from {{#invoke:Citation/CS1/sandbox|citation|SandboxPath=/...}}	is_sandbox = nil ~= string.find (frame:getTitle(), sandbox, 1, true);		-- is this invoke the sandbox module?	sandbox = is_sandbox and sandbox or '';										-- use i18n sandbox to load sandbox modules when this module is the sandox; live modules else		cfg = mw.loadData ('Module:Citation/CS1/Configuration' .. sandbox);			-- load sandbox versions of support modules when {{#invoke:Citation/CS1/sandbox|...}}; live modules else	whitelist = mw.loadData ('Module:Citation/CS1/Whitelist' .. sandbox);	utilities = require ('Module:Citation/CS1/Utilities' .. sandbox);	validation = require ('Module:Citation/CS1/Date_validation' .. sandbox);	identifiers = require ('Module:Citation/CS1/Identifiers' .. sandbox);	metadata = require ('Module:Citation/CS1/COinS' .. sandbox);	utilities.set_selected_modules (cfg);										-- so that functions in Utilities can see the selected cfg tables	identifiers.set_selected_modules (cfg, utilities);							-- so that functions in Identifiers can see the selected cfg tables and selected Utilities module	validation.set_selected_modules (cfg, utilities);							-- so that functions in Date validataion can see selected cfg tables and the selected Utilities module	metadata.set_selected_modules (cfg, utilities);								-- so that functions in COinS can see the selected cfg tables and selected Utilities module	z = utilities.z;															-- table of error and category tables in Module:Citation/CS1/Utilities	is_preview_mode = not utilities.is_set (frame:preprocess ('{{REVISIONID}}'));	local suggestions = {};														-- table where we store suggestions if we need to loadData them	local error_text;															-- used as a flag	local capture;																-- the single supported capture when matching unknown parameters using patterns	local empty_unknowns = {};													-- sequence table to hold empty unknown params for error message listing	for k, v in pairs( args ) do												-- get parameters from the parent (template) frame		v = mw.ustring.gsub (v, '^%s*(.-)%s*$', '%1');							-- trim leading/trailing whitespace; when v is only whitespace, becomes empty string		if v ~= '' then			if ('string' == type (k)) then				k = mw.ustring.gsub (k, '%d', cfg.date_names.local_digits);		-- for enumerated parameters, translate 'local' digits to Western 0-9			end			if not validate( k, config.CitationClass ) then							if type (k) ~= 'string' then									-- exclude empty numbered parameters					if v:match("%S+") ~= nil then						error_text = utilities.set_message ('err_text_ignored', {v});					end				elseif validate (k:lower(), config.CitationClass) then 					error_text = utilities.set_message ('err_parameter_ignored_suggest', {k, k:lower()});	-- suggest the lowercase version of the parameter				else					if nil == suggestions.suggestions then						-- if this table is nil then we need to load it						suggestions = mw.loadData ('Module:Citation/CS1/Suggestions' .. sandbox);	--load sandbox version of suggestion module when {{#invoke:Citation/CS1/sandbox|...}}; live module else					end					for pattern, param in pairs (suggestions.patterns) do		-- loop through the patterns to see if we can suggest a proper parameter						capture = k:match (pattern);							-- the whole match if no capture in pattern else the capture if a match						if capture then											-- if the pattern matches 							param = utilities.substitute (param, capture);		-- add the capture to the suggested parameter (typically the enumerator)							if validate (param, config.CitationClass) then		-- validate the suggestion to make sure that the suggestion is supported by this template (necessary for limited parameter lists)								error_text = utilities.set_message ('err_parameter_ignored_suggest', {k, param});	-- set the suggestion error message							else								error_text = utilities.set_message ('err_parameter_ignored', {k});	-- suggested param not supported by this template								v = '';											-- unset							end						end					end					if not utilities.is_set (error_text) then					-- couldn't match with a pattern, is there an explicit suggestion?												if (suggestions.suggestions[ k:lower() ] ~= nil) and validate (suggestions.suggestions[ k:lower() ], config.CitationClass) then							utilities.set_message ('err_parameter_ignored_suggest', {k, suggestions.suggestions[ k:lower() ]});						else							utilities.set_message ('err_parameter_ignored', {k});							v = '';												-- unset value assigned to unrecognized parameters (this for the limited parameter lists)						end					end				end				  			end			args[k] = v;														-- save this parameter and its value		elseif not utilities.is_set (v) then									-- for empty parameters			if not validate (k, config.CitationClass, true) then				-- is this empty parameter a valid parameter				k = ('' == k) and '(empty string)' or k;						-- when k is empty string (or was space(s) trimmed to empty string), replace with descriptive text				table.insert (empty_unknowns, utilities.wrap_style ('parameter', k));	-- format for error message and add to the list			end																				-- crude debug support that allows us to render a citation from module {{#invoke:}} TODO: keep?	--	elseif args[k] ~= nil or (k == 'postscript') then						-- when args[k] has a value from {{#invoke}} frame (we don't normally do that)	--		args[k] = v;														-- overwrite args[k] with empty string from pframe.args[k] (template frame); v is empty string here		end																		-- not sure about the postscript bit; that gets handled in parameter validation; historical artifact?	end		if 0 ~= #empty_unknowns then												-- create empty unknown error message		utilities.set_message ('err_param_unknown_empty', {			1 == #empty_unknowns and '' or 's',			utilities.make_sep_list (#empty_unknowns, empty_unknowns)			});	end	local non_url_param_t = {};													-- table of parameters and values that are not url-holding parameters	local url_param_t = {};	for k, v in pairs( args ) do		if 'string' == type (k) then											-- don't evaluate positional parameters			has_invisible_chars (k, v);											-- look for invisible characters		end		has_extraneous_punc (k, v);												-- look for extraneous terminal punctuation in parameter values		missing_pipe_check (k, v);												-- do we think that there is a parameter that is missing a pipe?		args[k] = inter_wiki_check (k, v);										-- when language interwiki-linked parameter missing leading colon replace with wiki-link label		if 'string' == type (k) then											-- when parameter k is not positional			if not cfg.url_skip[k] then											-- and not in url skip table				non_url_param_t[k] = v;											-- make a parameter/value list for extraneous url check			else																-- and is in url skip table (a url-holding parameter)				url_param_t[k] = v;												-- make a parameter/value list to check for values that are The Wikipedia Library url			end		end	end	has_extraneous_url (non_url_param_t);										-- look for url in parameter values where a url does not belong	if has_twl_url (url_param_t) then												-- look for url-holding parameters that hold a The Wikipedia Library url		args['url-access'] = 'subscription';	end	return table.concat ({		frame:extensionTag ('templatestyles', '', {src='Module:Citation/CS1' .. sandbox .. '/styles.css'}),		citation0( config, args)	});end--[[--------------------------< C I T A T I O N >--------------------------------------------------------------Template entry point]]local function citation (frame)	local config_t = {};														-- table to store parameters from the module {{#invoke:}}	local args_t = frame:getParent().args;										-- get template's preset parameters	for k, v in pairs (frame.args) do											-- get parameters from the {{#invoke}} frame		config_t[k] = v;	--	args_t[k] = v;															-- crude debug support that allows us to render a citation from module {{#invoke:}}; skips parameter validation; TODO: keep?	end		return _citation (frame, args_t, config_t)end--[[--------------------------< E X P O R T E D   F U N C T I O N S >------------------------------------------]]	return {	citation = citation,														-- template entry point		_citation = _citation,														-- module entry point	}
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