A question or two about things and relationships

[glassboy]

Hi there, I'm a little bit confused by the relationships.

If I create a thing - let's say the Necromonicon it should have a relationship to its creator. It doesn't belong to its creator and the simple relationship doesn't seem to have the right qualifiers.

I can then have a place, let's say the British Museum, and it can have a "belongs to or within" relationship with the Necromonicon. Which seems simple enough, and reflects that the BM may have a copy.

Then I want to create piece of information\knowledge and other things like rituals and link them back to the Necromonicon. Which I haven't quite sussed.

Then say Friedrich von Junzt’s Nameless Cults. Is an arbitrary relationship between Nameless Cults the most appropriate as describing it as a derivative work?

Perhaps I seem a bit pedantic but I spend a lot of time modelling in UML.