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.

Search null by term id

Choose a target (optional)
Mapping Distance
1 2 3
Enter list of identifiers:

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.