Mr. Denny Vandrecic, many thanks for your detailed answer. Let me try to explain the open questions "I am not a lawyer, but I want to point out that there is a distinction between Copyright and other IP protection. Whereas a text about the classification of hammers may (and usually is) copyrighted, the mere fact that a hammer is a tool can not be copyrighted." -One would hope so, but there are so many strange things which are under IP protection that I wouldnt count on that and let a lawyer have a look on that. "Also, we need to make a distinction between the IP for the data model of Wikidata and the content of Wikidata." -John McClure was talking about the underlying basic data model and I just replied to his ISO topic map comment. I havent looked much at your Wikidata data model sofar. If you export RDF and ISO topic maps then this discussion is for moment rather not important. -Regarding the discussion about the ISO - I was talking about their content classification scheme. That is if the wikidata classification (like a hammer is a tool etc.) is built up (or in other words the wikidata ontology) then one may accidentally or on purpose use the ISO classifications. And it would at least make sense to refer to them since a lot of industrial applications use ISO standards. "Just as the MediaWiki developers do not decide on the content of Wikipedia, the Wikidata developers do not decide on the content of Wikidata. I hope the distinction makes sense." - I understand this however at some point it seems the wikidata project has to think about these issues moreover eventually your data model could be influenced by ISO choices, but as said I havent looked into that yet