For collecting (and giving back later on!) information from Wikipedia (or other
MediaWikis) we are interested in structured data from a
http://meta.wikimedia.org/wiki/Machine-friendly_wiki_interface.
A request like <url>Foo?action=raw and <url>Special:Export (for XML) do a good
job. The problem is, that for *categories* this "action=raw" returns the wiki
tags. But what we would need is its *evaluated content*, i.e. the list of
articles, not the command which generates them.
How about an extension 'evaluated' like say
http://de.wikipedia.org/wiki/Kategorie:Ort_in_der_Schweiz?action=raw&ev…
which does not return the Wiki tags ("[[Kategorie:Ort in Europa|Schweiz]]...")
but the list as it is presented in the default HTML page.
The same would apply to the Special:Export-Page, where obviously this would be
an option.