See (It allows execution of wiki code and parser
functions<http://www.mediawiki.org/wiki/Extension:ParserFunctions>wit…
tags before the tag is processed.)
{{#tag:*tagname*
|*content*
|*attribute1=value1*
|*attribute2=value2*
}}
on
http://www.mediawiki.org/wiki/Help:Magic_words#Miscellaneous
Daniel Forgues