Modified on: Mon, 13 Feb, 2017 at 2:56 PM
I think it's worth pointing out that although Protege 4 is in common use, Protege 3 is still an active product - something that we confirmed with the Protege team a little while ago.
The key capabilities of Protege 3 that are missing from Protege 5 are:
- Multi-user support (that is multiple users working on the ontology concurrently)
- Database backend (we recommend this for large ontologies with thousands of instances)
- Support for Frames based ontologies
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