View source for WTP/Template documentation

===Category===
Some templates are designed to add pages to a given category. Sometimes it's good enough if the template page itself is also shown in that category.
Generally that's not the case. Templates adding pages to a category then use:
 ''...end of code''&lt;includeonly&gt;[&#91;Category:''target''&#93;]
 &lt;/includeonly&gt;&lt;noinclude&gt;
 ''documentation and/or link to talk page''
 [&#91;Category:''tempcat''|{&#123;PAGENAME&#125;}&#93;]
 &lt;/noinclude&gt;
Here ''target'' means a category for pages using the template, and
''tempcat'' is a category for similar templates.

A small improvement seen on some templates replaces
<tt>[&#91;Category:''target''&#93;]</tt> by
<tt><nowiki>{{{category|[[Category:</nowiki>''target''<nowiki>]]}}}</nowiki></tt>.
Normally the dummy parameter <tt><nowiki>{{{category}}}</nowiki></tt> is undefined (unused),
and then the template adds pages to category ''target'' as before. Setting <tt>category=</tt>
(empty value) allows to disable this feature on lists of templates. Otherwise template lists
with examples would be added to the various ''target'' categories of templates explained by example.