View source for Template:Get QID/doc

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== Usage ==
This template retrieves the [[WP:Wikidata|Wikidata]] QID that corresponds to the ''Wikipedia page title'' or ''redirection page title'' specified in the first unnamed parameter (also kmown as ''Wikipedia sitelink'', not to be confused with the Wikidata label). If a page is moved, a {{tlp|Get QID|<page title>}} call referring to its former title typically still works, since the template follows the redirection destination, if the redirection source does not have a Wikidata item of its own. If no parameter is defined ({{tlp|Get QID}}), it retrieves the QID of the current page. If the qid parameter is defined ({{tlp|get QID|qid=<QID>}}) it just passes it on.

===Current page===
Example:
 <code><nowiki>{{Get QID}}</nowiki></code> &rarr; {{Get QID}}
gives the QID of the currently showed Wikipedia page, or an empty text string if no QID is defined:

===Articles sharing the same label===
The template does ''not'' use the Wikidata label, but the Wikipedia page title. For example, the following two pages share the same Wikidata label ''Mars'':
 <code><nowiki>{{Get QID|Mars}}</nowiki></code> &rarr; {{Get QID|Mars}}
 <code><nowiki>{{Get QID|Mars (mythology)}}</nowiki></code> &rarr; {{Get QID|Mars (mythology)}}
This gives the QID:s of [[Mars (planet)]] and [[Mars (mythology)]] respectively.

===Redirection page===
 <code><nowiki>{{Get QID|universes}}</nowiki></code> &rarr; {{Get QID|universes}}
gives the QID of the page [[universe]], since [[universes]] is redirected to that article, and does not have a Wikidata item of its own.

Usage together with the Q template: 
 <code><nowiki>{{Q|{{Get QID|universes}}}}</nowiki></code>  &rarr; {{Q|{{Get QID|universes}}}}

===Redirection page with its own Wikidata item===
[[Maryport New Lighthouse]] is redirected to [[Maryport Lighthouse]], both having separate Wikidata items:
 <code><nowiki>{{Q|{{Get QID|Maryport New Lighthouse}}}}</nowiki></code> &rarr; {{Q|{{Get QID|Maryport New Lighthouse}}}}

===Passing QID parameter on===
 <code><nowiki>{{Get QID|qid=Q111}}</nowiki></code> &rarr; {{Get QID|qid=Q111}}

===Substitution===
To make Wikipedia faster, and to make the result less vulnerable to future deletion of redirects, this templated may be substituted: <code><nowiki>{{subst:Get QID|<page title>}}</nowiki></code>, for example:
 <code><nowiki>{{subst:Get QID|universe}}</nowiki></code> &rarr; Q1 
which is immediately replaced by the resulting QID when saved.
 
However, a purpose of this template is to make the wikicode more comprehensible by avoiding QID codes, which substitution counteracts.

===Other ways of getting the QID===
Invoking these modules may also provide the QID for a certain Wikipedia page title:
 <code><nowiki>{{#invoke:wd|label|raw|page=Mars (mythology)}}</nowiki></code> &rarr; {{#invoke:wd|label|raw|page=Mars (mythology)}}
 <code><nowiki>{{#invoke:WikidataIB|getEntityFromTitle|Mars (mythology)}}</nowiki></code> &rarr; {{#invoke:WikidataIB|getEntityFromTitle|Mars (mythology)}}
but they do not follow redirects.

The following module provides the page title of a redirect destination:
 <code><nowiki>{{#invoke:Redirect|main|Universes}}</nowiki></code> &rarr; {{#invoke:Redirect|main|Universes}}

== See also ==
* {{tl|Area WD}}
* {{tl|Population WD}}
* {{tl|Popdens WD}}

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