logo Mondo Disease Ontology

A global community effort to harmonize multiple disease resources to yield a coherent merged ontology.

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The Mondo Disease Ontology (Mondo) aims to harmonize existing disease terminologies into a coherent ontological representation of diseases. Mondo integrates widely used terminologies such as Online Mendelian Inheritance in Man (OMIM), Orphanet, Experimental Factor Ontology (EFO), Disease Ontology (DOID), ICD 11 (Foundation) and the neoplasm branch of National Cancer Institute Thesaurus (NCIt). Mondo aims to track provenance and attribution for every integrated part of the disease definition to serve a wide range of data integration and cross-terminology analysis use cases.

A key part of Mondo is the curation of precise mappings across resources. These mappings are available in two ways:

Products
mondo.owl Main OWL edition Complete ontology. Uses MONDO IDs. Imports merged. The original mondo.owl without merged imports and with equivalence axioms can now be obtained from the release pages and is called mondo-with-equivalents.
mondo.obo obo-format edition As OWL. xrefs can be used as proxy for equivalence. Uses Mondo IDs.
mondo.json json edition Equivalent to the OWL edition.
mondo/mondo-base.owl Mondo Base Module The main ontology plus axioms connecting to select external ontologies, excluding the external ontologies themselves
Usages
User
https://www.clinicalgenome.org/
Description
Mondo is used by the ClinGen for disease curations.
Type
annotation
Examples
FBN1 is an autosomal dominant mutation in Marfan syndrome.
User
https://portal.kidsfirstdrc.org/
Description
Mondo is used by the Kids First Data Resource Portal for disease annotations. Note, a login is needed to access the portal and view the Mondo-curated data.
Type
annotation
User
https://www.ancestry.com/
Description
Mondo is used by the Ancestory for some disease curations.
Type
annotation
Examples
Some term names in ancestory.com are curated with Mondo, for ease of use.
User
https://www.humancellatlas.org/
Description
Mondo is used by the Human Cell Atlas for some disease annotations.
Type
annotation
Examples
Disease status specimen is normal, type 2 diabetes mellitus.