NCI Thesaurus OBO Edition
NCI Thesaurus (NCIt) provides reference terminology that includes broad coverage of the cancer domain, including cancer related diseases, findings and abnormalities.
The NCI Thesaurus is an ontology-like vocabulary that includes broad coverage of the cancer domain, including cancer related diseases, findings and abnormalities; anatomy; agents, drugs and chemicals; genes and gene products and so on. In certain areas, like cancer diseases and combination chemotherapies, it provides the most granular and consistent terminology available. It combines terminology from numerous cancer research related domains, and provides a way to integrate or link these kinds of information together through semantic relationships.
The Thesaurus currently contains over 34,000 concepts, structured into 20 taxonomic trees. The NCI Thesaurus provides concept history tables to record changes in the vocabulary over time as the science changes. Within NCI, the Thesaurus is used to provide terminology support to the Institutes public Web portal, http://cancer.gov, numerous portals supporting consortia and other communities of researchers, and is used in the caCORE as the semantic base for metadata and objects that form the infrastructure upon which the NCICB portals are built (see http://ncicb.nci.nih.gov). It is published under an open content license in a number of formats including OWL.
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