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