[Versa] Versa issue: Qname helper functions

[Chimezie Ogbuji]

 > I just wanted to point out that we need to be careful with terminology.
>   Lists and containers are different.  I think we need a set of
> functions to handle each.  I mappings from these two RDF data types to
> Sets or lists.
> 
> Mike

(From the relevant parts of the spec: 
http://www.w3.org/TR/rdf-mt/#Containers
http://www.w3.org/TR/rdf-mt/#Containers)

- rdfBag(<bag_uri>)   -> Versa set
- rdfSeq(<seq_uri>)   -> Versa list
- rdfAlt(<bag_uri>)   -> Versa set
- rdfList(<list_uri>)   -> Versa set    (also called 'collections')

?