SMW Demo
From FollowTheScore
University of Karlsruhe an others are developing a Mediawiki extension called Semantic Mediawiki.
We have set up a couple of small example pages to give an idea of this approach:
Persons: Peter, Lucie ; persons have an Age and play an Instrument Instrument; Trombone, Piano, ..
Click on one of the above links and follow the navigation.
Using "ask" you can formulate queries like "who plays an instrument?".
<ask>
plays::+ plays:=* Age:=*
</ask>