Thad Guidry, 08/01/2015 18:58:
Unless the P17 Country property had an expanded definition of "sovereign state (or originating sovereign state) of this item"
That's more like P27. Both are rather flexible though, see their talk pages. https://www.wikidata.org/wiki/Property_talk:P17
- How does Wikidata want to handle Property / Statement rule
enforcement and Freebase's incompatible types ?
I'm not sure how this is an example of "incompatible" type, it sounds more like a type Freebase didn't have. Handling such differences is possible by tweaking property descriptions and adding constraints. P17 is already declared incompatible with "instance of: human". If you make "music band" a subclass of "human", then this statement about U2 will be reported by bots as a constraint violation.
- How does Wikidata want to handle locking down Property descriptions
(Freebase uses Permissions and Owners), where the complete meaning of something being changed might cause severe wrongful polluted data ?
There is no such thing in wikis. http://c2.com/cgi/wiki?WikiDesignPrinciples https://meta.wikimedia.org/wiki/The_wiki_way
The errors are corrected after the fact; the central control system is not made of permissions, but of checks like the constraint violations bots mentioned above. What other pollutions of the data you have in mind?
Nemo