A semantic web interface to Wikipedia, named dbpedia http://dbpedia.org/About, provides conceptual access to information. For example, you can take a look at the beginnings of a Military Conflict query

  http://dbpedia.neofonie.de/browse/rdf-type:Military%20Conflict/

or Disease query

  http://dbpedia.neofonie.de/browse/rdf-type:Disease/

 

I have thought about how we might want to use Semantic Web tools to capture information that could then be used in modeling, but it had not occured to me to use Wikipedia as part of the community involvement mechanisim for capture and refinement of the data.