There are many articles online and a few printed books available on the subject of Fact Oriented Modeling. When you've registered you may download an e-Book from the download section containing the original texts on FCO-IM. If you're into self-study, we recomment the book "Fact Oriented Modeling with FCO-IM". It's recently published and it's really easy to read and learn the basics.

And some of these are also available in Dutch:



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