Further information on fact based modeling can be found at the following websites:
http://nl.wikipedia.org/wiki/NIAM
http://www.starlab.vub.ac.be/research/dogma.htm
http://en.wikipedia.org/wiki/FCO-IM
http://en.wikipedia.org/wiki/Object_role_modeling
http://www.sjirnijssen.eu
http://www.orm.net
http://www.ormfoundation.org
http://www.starlab.vub.ac.be/website/research
http://dataconstellation.com/ActiveFacts