changed:
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We need to store ontology schemas and instances in a data store of some kind.  A database makes sense.

Requirements:

- protege can interact with it.  Protege is our main ontology editor at the moment.

- supports collaboration, i.e. more than one person can edit the ontology at the same time

- supports versioning, i.e. like CVS for code.

- supports the representation language that we use.  At present we are using RDF/XML exports of Protege's OKBC-lite format.  We want to move to OWL.

- scales well with large datasets

Would be nice

- if we could access the data without having to go through Protege

- supports ontological querying - though this may need to be another module that uses a copy/import of the database store.