standards > terminology artifact > DOI:10.25504/FAIRsharing.119q9t
Did we miss something? Our COVID-19 Collection is growing, but not yet complete. Tell us what's missing. Email or add missing resources to our spreadsheet

ready UMLS Semantic Network

General Information
The US National Library of Medicine has developed the Unified Medical Language System (UMLS), whose goal it is to provide integrated access to a large number of biomedical resources by unifying the vocabularies that are used to access those resources. The UMLS Metathesaurus interrelates more than 150 controlled vocabularies in the biomedical domain. The UMLS coverage is quite extensive, including not only many concepts in clinical medicine, but also a large number of concepts applicable to the broad domain of the life sciences. In order to provide an overarching conceptual framework for all UMLS concepts, the UMLS Semantic Network, an upper-level ontology, has been developed. The Semantic Network provides a consistent categorization of all concepts represented in the UMLS Metathesaurus. The links between the semantic types provide the structure for the network and represent important relationships in the biomedical domain. The Semantic Network consists of (1) a set of broad subject categories, or Semantic Types, that provide a consistent categorization of all concepts represented in the UMLS Metathesaurus, and (2) a set of useful and important relationships, or Semantic Relations, that exist between Semantic Types.


Countries that developed this resource United States

Created in 1990

Taxonomic range

How to cite this record UMLS Semantic Network; UMLS Semantic Network; DOI:; Last edited: Jan. 29, 2020, 10:53 a.m.; Last accessed: Sep 21 2020 9:58 a.m.

Publication for citation  An upper-level ontology for the biomedical domain. McCray AT; Comp Funct Genomics ; 2008; 10.1002/cfg.255;

This record is maintained by

Record added: Oct. 24, 2017, 9:41 a.m.
Record updated: Jan. 29, 2020, 10:53 a.m. by The FAIRsharing Team.

Show edit history

In Collections



Additional Information

External Links


    No tools defined


No XSD schemas defined


An upper-level ontology for the biomedical domain.

McCray AT
Comp Funct Genomics 2008

View Paper (PubMed) View Publication

STY Ontology Display

View in BioPortal.

Disclaimer: This widget assumes the availability of the ontology resources in the NCBO BioPortal.

Related Standards

Reporting Guidelines

No guidelines defined

Models and Formats

No syntax standards defined

Identifier Schemas

No identifier schema standards defined


No metrics standards defined

Related Databases (0)

No Related Databases

Implementing Policies

This record is not implemented by any policy.


Record Maintainer