Editing Help:Transclusion (section)

===Substitution===
{{Main|Help:Substitution}}
Transclusion events occur each time the target page is loaded and the template is rendered. A related event is Substitution, where a template call is replaced with its transcluded source content at the time it is invoked in a ''one-time'' inclusion of the content. Unlike transclusion, which continuously updates the target page with changes from the source, substitution results in a ''one-time'' inclusion of the content, meaning that subsequent updates to the source content ''will not'' be reflected in the target page. For example, a template call for <syntaxhighlight lang="wikitext" inline="">{{Pagename}}</syntaxhighlight> with the <syntaxhighlight lang="wikitext" inline="">subst:</syntaxhighlight> prefix results in the substitution template call <syntaxhighlight lang="wikitext" inline="">{{subst:Pagename}}</syntaxhighlight>. When invoked, this template is replaced, also referred to as substituted, with the actual wikitext of the source page at the time of the call, thereby making it a permanent part of the target page.{{refn|group=lower-alpha|In simpler terms, the page is ''published'' or ''saved'', and any future changes to the source page will not affect this substituted content.}} 

For example, when <syntaxhighlight lang="wikitext" inline="">{{subst:Like}}</syntaxhighlight> is inserted in a page and the changes published, it would substitute that wikitext with the actual wikitext from {{Xtn|[[Template:Like]]}}. In practice, subsequent updates to {{Xtn|[[Template:Like]]}} ''will not'' be reflected in the page it was substituted into.