['interviewer-first#'] = true,
['interviewer#-first'] = true,
['interviewer-given#'] = true,
['interviewer#-given'] = true,
['interviewer-last#'] = true,
['interviewer#-last'] = true,
['interviewer-surname#'] = true,
['interviewer#-surname'] = true,
['interviewer-link#'] = true,
['interviewer#-link'] = true,
['interviewer-mask#'] = true,
['interviewer#-mask'] = true,
['last#'] = true,
['subject#'] = true,
['subject-first#'] = true,
['subject#-first'] = true,
['subject-given#'] = true,
['subject#-given'] = true,
['subject-last#'] = true,
['subject#-last'] = true,
['subject-link#'] = true,
['subject#-link'] = true,
['subject-mask#'] = true,
['subject#-mask'] = true,
['subject-surname#'] = true,
['subject#-surname'] = true,
['surname#'] = true,
['translator#'] = true,
['translator-first#'] = true,
['translator#-first'] = true,
['translator-given#'] = true,
['translator#-given'] = true,
['translator-last#'] = true,
['translator#-last'] = true,
['translator-surname#'] = true,
['translator#-surname'] = true,
['translator-link#'] = true,
['translator#-link'] = true,
['translator-mask#'] = true,
['translator#-mask'] = true,
}  
--2
templates.  
Same conventions for true/false/tracked/nil as above.  
local preprint_arguments_t = {
arxiv = {
['arxiv'] = true, -- cite arxiv and arxiv identifiers
['class'] = true,
['eprint'] = true, -- cite arxiv and arxiv identifiers
},
biorxiv = {
['biorxiv'] = true,
},
citeseerx = {
['citeseerx'] = true,
},
medrxiv = {
['medrxiv'] = true,
},
ssrn = {
['ssrn'] = true,
['SSRN'] = true,
['ssrn-access'] = true,
},
}  
--2 templates. The limited subset is defined
here.  
This list of parameters also used by  
Same conventions for true/false/tracked/nil as above.  
local limited_basic_arguments_t = {
['at'] = true,
['author'] = true,
['author-first'] = true,
['author-given'] = true,
['author-last'] = true,
['author-surname'] = true,
['author-link'] = true,
['authorlink'] = true,
['author-mask'] = true,
['collaboration'] = true,
['date'] = true,
['df'] = true,
['display-authors'] = true,
['first'] = true,
['given'] = true,
['language'] = true,
['last'] = true,
['mode'] = true,
['name-list-style'] = true,
['no-tracking'] = true,
['p'] = true,
['page'] = true,
['pages'] = true,
['postscript'] = true,
['pp'] = true,
['quotation'] = true,
['quote'] = true,
['ref'] = true,
['surname'] = true,
['template-doc-demo'] = true,
['title'] = true,
['trans-title'] = true,
['vauthors'] = true,
['year'] = true,
}  
local limited_numbered_arguments_t = {
['author#'] = true,
['author-first#'] = true,
['author#-first'] = true,
['author-given#'] = true,
['author#-given'] = true,
['author-last#'] = true,
['author#-last'] = true,
['author-surname#'] = true,
['author#-surname'] = true,
['author-link#'] = true,
['author#-link'] = true,
['authorlink#'] = true,
['author#link'] = true,
['author-mask#'] = true,
['author#-mask'] = true,
['first#'] = true,
['given#'] = true,
['last#'] = true,
['surname#'] = true,
}  
----------------------------< U N I Q U E _ A R G U M E N T S >----------------------------------------------  
Some templates have unique parameters. Those templates and their unique parameters are listed here. Keys in this
table are the template's CitationClass parameter value  
Same conventions for true/false/tracked/nil as above.  
local unique_arguments_t = {
['audio-visual'] = {
['people'] = true,
['transcript'] = true,
['transcript-format'] = true,
['transcript-url'] = true,
},
conference = {
['book-title'] = true,
['conference'] = true,
['conference-format'] = true,
['conference-url'] = true,
['event'] = true,
},
episode = {
['airdate'] = true,
['air-date'] = true,
['credits'] = true,
['episode-link'] = true, -- alias of |title-link=
['network'] = true,
['people'] = true,
['season'] = true,
['series-link'] = true,
['series-no'] = true,
['series-number'] = true,
['station'] = true,
['transcript'] = true,
['transcript-format'] = true,
['transcript-url'] = true,
},
mailinglist = {
['mailing-list'] = true,
},
map = {
['cartography'] = true,
['inset'] = true,
['map'] = true,
['map-format'] = true,
['map-url'] = true,
['map-url-access'] = true,
['script-map'] = true,
['sections'] = true,
['sheet'] = true,
['sheets'] = true,
['trans-map'] = true,
},
newsgroup = {
['message-id'] = true,
['newsgroup'] = true,
},
report = {
['docket'] = true,
},
serial = {
['airdate'] = true,
['air-date'] = true,
['credits'] = true,
['episode'] = true, -- cite serial only TODO: make available to cite episode?
['episode-link'] = true, -- alias of |title-link=
['network'] = true,
['people'] = true,
['series-link'] = true,
['station'] = true,
},
speech = {
['conference'] = true,
['conference-format'] = true,
['conference-url'] = true,
['event'] = true,
},
thesis = {
['degree'] = true,
['docket'] = true,
},
}  
----------------------------< C I T E _ D O C U M E N T >----------------------------------------------------  
Special case for cite document. This template takes the limited basic and limited enumerated parameters plus
others that are apply only to standalone published sources that cannot be cited any other way; no url, book,
periodical, etc parameters; limited support for name lists and named identifiers.  
when validating parameters in templates, the basic and  
local document_arguments_t = {
['bibcode'] = true,
['bibcode-access'] = true,
['doi'] = true,
['DOI'] = true,
['doi-access'] = true,
['doi-broken-date'] = true,
['hdl'] = true,
['HDL'] = true,
['hdl-access'] = true,
['id'] = true,
['ID'] = true,
['jfm'] = true,
['JFM'] = true,
['lang'] = true,
['location'] = true,
['mr'] = true,
['MR'] = true,
['no-pp'] = true,
['orig-date'] = true,
['origyear'] = true,
['orig-year'] = true,
['osti'] = true,
['OSTI'] = true,
['osti-access'] = true,
['place'] = true,
['publisher'] = true,
['quote-page'] = true,
['quote-pages'] = true,
['script-quote'] = true,
['script-title'] = true,
['title-link'] = true,
['translator'] = true,
['translator-first'] = true,
['translator-given'] = true,
['translator-last'] = true,
['translator-surname'] = true,
['translator-link'] = true,
['translator-mask'] = true,
['trans-quote'] = true,
['type'] = true,
['zbl'] = true,
['ZBL'] = true,
}  
local document_numbered_arguments_t = {
['translator#'] = true,
['translator-first#'] = true,
['translator#-first'] = true,
['translator-given#'] = true,
['translator#-given'] = true,
['translator-last#'] = true,
['translator#-last'] = true,
['translator-surname#'] = true,
['translator#-surname'] = true,
['translator-link#'] = true,
['translator#-link'] = true,
['translator-mask#'] = true,
['translator#-mask'] = true,
}  
----------------------------< L I S T _ C O M B I N E >------------------------------------------------------  
makes one table from a list of tables. <lists_t> is a sequence of tables to be combined  
local function list_combine (lists_t)
local out_t = {};  
for _, list_t in ipairs (lists_t) do -- for each list in <lists_t>
for k, v in pairs (list_t) do -- extract each k/v pair
out_t[k] = v; -- add to <out_t>
end
end
return out_t; -- and done
end  
----------------------------< T E M P L A T E _ L I S T _ G E T >--------------------------------------------  
gets a list of the templates from table t  
local function template_list_get (t)
local out_t = {}; -- a table for output
for k, _ in pairs (t) do -- spin through the table and collect the keys
table.insert (out_t, k) -- add each key to the output table
end
return out_t; -- and done
end  
----------------------------< E X P O R T E D T A B L E S >------------------------------------------------  
return {
preprint_arguments_t = preprint_arguments_t,
preprint_template_list_t = template_list_get (preprint_arguments_t), -- make a template list from preprint_arguments{} table
unique_arguments_t = unique_arguments_t,
unique_param_template_list_t = template_list_get (unique_arguments_t), -- make a template list from unique_arguments{} table