Jean-Marc,
Yes it is. See http://handleiding.wikiation.nl/MediaWiki:Common.css for the definition and http://handleiding.wikiation.nl/Niveau_2_infobox_gebruiken for the implementation of that definition.
I use it to mark pages with a "Timecode". Normal pages are "now", but some are "Timecode-future". The content is written but not yet implemented in the real live. So I add this category. If the content is "now", the only thing I have to do is remove the category.
But be aware. A category may have multiple parents in MediaWiki. If you use multiple parents AND you use multiple styles, then the result will be unpredictable.
Good luck.
Bernard
Jean-Marc van Leerdam wrote:
Hi,
What is the best approach to support styling MW pages based on the category (categories) the page belongs to?
I was hoping the category name could be inserted in the class attribute just like the namespace and pagename appear there, but I did not find any configuration setting indicating that this is possible at the moment.
Thanks in advance for your suggestions.