Schema.org RDF

 Hi,

I am working on auto code generation from schema.org RDF (  http://schema.org/docs/schema_org_rdfa.html  ). So I have some questions:

1) Can all of the class properties have multiple values (like employee property of the organization)? Or some of properties must have single value?
2) Are there any namespace/packaging strategy? Classes are to many to keep them as single block.

I know that schema is used for HTML markup. But I think that it's a good idea to have code lib to simplify working with schema.org types. 

Best regards,
Oleg Barmin.