[osis-core] canonical order in scope

[Chris Little]

We have a small ambiguity in the <scope> element, I think.  If I desire to 
indicate that my document covers all 66 books of the Protestant canon, I 
assume that would be indicated with <scope>Gen-Rev</scope>.

So what do I use to indicate that my document covers all books in the
Catholic canon?  Isn't that also, technically Gen-Rev?

I think we either need to define a canonical book ordering, disallow book 
ranges in scope, or define some other solution that I haven't thought of.  
I suppose this depends somewhat upon having standard reference systems 
that we haven't yet defined.

--Chris