parentArgs[param] = parentArgs[alias]
end
end  
--Redirect deprecated parameters to proper parameter names, and assign tracking cat
for _, d in pairs( p.deprecated ) do
local dep, param = d[1], d[2]
if (parentArgs[param] == nil or parentArgs[param] == '') and parentArgs[dep] then
parentArgs[param] = parentArgs[dep]
if namespace == 0 then
deprecatedIdCat = ''
end
end
end  
--Use QID= parameter for testing/example purposes only
local itemId = nil
if namespace ~= 0 then
local qid = parentArgs['qid'] or parentArgs['QID']
if qid then
itemId = 'Q'..mw.ustring.gsub(qid, '^[Qq]', '')
itemId = resolveEntity._id(itemId) --nil if unresolvable
end
else
itemId = mw.wikibase.getEntityIdForCurrentPage
end  
--Wikidata fallback if requested
if itemId then
for _, params in ipairs( p.conf ) do
if params[3] > 0 then
local val = parentArgs[mw.ustring.lower(params[1])] or parentArgs[params[1]]
if val == nil or val == '' then
local canUseWikidata = nil
if reqs[params[1]] then
canUseWikidata = p.matchesWikidataRequirements( itemId, reqs[params[1]] )
else
canUseWikidata = true
end
if canUseWikidata then
local wikidataIds = p.getIdsFromWikidata( itemId, 'P'..params[3] )
if wikidataIds[1] then
if val == '' and (namespace == 0 or testcases) then
suppressedIdCat = '[[Category:Wikipedia articles with suppressed authority control identifiers|'..params[1]..']]'
else
parentArgs[params[1]] = wikidataIds[1]
end end end end end end end  
--Configured rows
local rct = 0
for _, params in ipairs( p.conf ) do
local val = parentArgs[mw.ustring.lower(params[1])] or parentArgs[params[1]]
if val and val ~= '' and type(params[4]) == 'function' then
table.insert( elements, p.createRow( params[1], params[2]..':', val, params[4]( val ), true, params.category ) )
rct = rct + 1
end
end  
--WorldCat
local worldcatId = parentArgs['worldcatid'] or parentArgs['WORLDCATID']
if worldcatId and worldcatId ~= '' then --if WORLDCATID present & unsuppressed
table.insert( elements, p.createRow( 'WORLDCATID', *, worldcatId, 'WorldCat Identities: 'PATH')..' '..worldcatId..*, false ) ) --Validation?
worldcatCat = ''
elseif worldcatId == nil then --if WORLDCATID absent but unsuppressed
local viafId = parentArgs['viaf'] or parentArgs['VIAF']
local lccnId = parentArgs['lccn'] or parentArgs['LCCN']
if viafId and viafId ~= '' and p.viafLink( viafId ) then --VIAF must be present, unsuppressed, & validated
table.insert( elements, p.createRow( 'VIAF', *, viafId, 'WorldCat Identities (via VIAF): '..viafId..*, false ) )
if namespace == 0 then
worldcatCat = ''
end
elseif lccnId and lccnId ~= '' and p.lccnLink( lccnId ) then --LCCN must be present, unsuppressed, & validated
local lccnParts = p.splitLccn( lccnId )
if lccnParts and lccnParts[1] ~= 'sh' then
local lccnIdFmtd = lccnParts[1]..lccnParts[2]..'-'..lccnParts[3]
table.insert( elements, p.createRow( 'LCCN', *, lccnId, 'WorldCat Identities (via LCCN): '..lccnIdFmtd..*, false ) )
if namespace == 0 then
worldcatCat = ''
end
end
end
elseif worldcatId == '' then --if WORLDCATID suppressed
suppressedIdCat = ''
end  
local Navbox = require('Module:Navbox')
local elementsCat = ''
if rct == 0 or rct >= 25 then
local eCat = 'AC with '..rct..' elements'
elementsCat = ''..p.redCatLink(eCat)
end  
local outString = ''
if #elements > 0 then
local args = { pid = 'identifiers' } -- #target the list of identifiers
if testcases and itemId then args = { pid = 'identifiers', qid = itemId } end --expensive
local pencil = :expandTemplate{ title = 'EditAtWikidata', args = args}
outString = Navbox._navbox( {
name = 'Authority control',
navbox,
body,
group1 = ''..pencil,
list1 = table.concat( elements )
} )
end  
local auxCats = worldcatCat .. elementsCat .. suppressedIdCat .. deprecatedIdCat
if testcases then
auxCats = mw.ustring.gsub(auxCats, '(%[%[)(Category)', '%1:%2') --for easier checking
end
outString = outString .. auxCats
if namespace ~= 0 then
outString = mw.ustring.gsub(outString, '(%[%[)(Category:Wikipedia articles)', '%1:%2') --by definition
end  
return outString
end  
return p