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Canonical release

The latest canonical release is always available at

Versions in OBO format and OBOGraph JSON are also available.


Please refer to the OBOOK for an explanation of what those variants are.

Multi-species ontologies

Please refer to our multi-species ontologies page for an explanation of what we call a “collected” or a “composite” ontology.

Note that the bridge files, used to merge Uberon/CL with the taxon-specific ontologies, are treated as intermediate products and are not available as release artifacts. Consequently, they must be obtained directly from the GitHub repository. The mappings from which the bridges are derived are available as a SSSOM file.


Taxon-specific subsets

Topic-specific subsets