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Updated contents at https://mmisw.org/orrdoc/from2to3/

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Similarly as with "orr," orr-portal is a UI to a repository of ontologies. But there are important differences in underlying technologies, implementation approach, and significantly improved user experience (UX) features.

Aspect	previous UI	orr-portal
Ontology search	Minimal	✅ Faceted based
ORR vocabulary ("voc2rdf") dispatch	Limited	✅ Improved
ORR mapping ("vine") dispatch	Limited	✅ Improved
Admin interface	No	✅ Yes
Language/toolkit	Java / GWT	✅ Javascript / Angular