Welcome to the EMBL-EBI Ontology Xref Service (OxO).

OxO is a service for finding mappings (or cross-references) between terms from ontologies, vocabularies and coding standards. OxO imports mappings from a variety of sources including the Ontology Lookup Service and a subset of mappings provided by the UMLS. We're still developing the service so please get in touch if you have any feedback.

Search OxO by term id Choose a target (optional) Mapping Distance:
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OxO summary

To use OxO either search for mappings using a particular identifier (e.g. MESH:D009202) or select a datasource below to view all mappings between datasources.