Updated ontology for annotations.

Hi folks,

    We are looking at adding annotations to our project and think need some
    modifications to the Annotea RDF for annotations. Let me outline the
    requirements and would like to hear if anyone else had similar
    requirements and how they solved it (or even recommendations).

    a) Versioning

    We need to keep a history of annotations as they get modified (we believe
    mostly context and content)

    b) Annotating multiple objects at once

    Annotea by default points to a single object. We might need an annotation
    for multiple objects (& multiple contexts), but same annotation content.

    regards

Amit