EVS has helped create, harmonize with, and publish several of these terminologies.
Other Terminologies: EVS licenses, processes and makes available individually through EVS systems, many other terminologies of special interest to NCI and the research community. NCIm starts from a subset of NLM's UMLS Metathesaurus, and modifies and extends it with many additional sources. NCIm contains most terminologies used by NCI for clinical care, translational and basic research, and provides a rich source of definitions, synonyms, codes, and other information. NCI Metathesaurus (NCIm) Maps 7,500,000 terms from more than 100 sources into 3,200,000 biomedical concepts that represent their meaning. NCIt is now a broadly shared coding and semantic infrastructure resource – nearly half of NCIt concepts include content explicitly tagged by one or more EVS partners (see the shared terminology development wiki page). 
NCIt combined and extended core NCI terminologies within a scientifically and technically rigorous framework.
NCI Thesaurus (NCIt) is NCI's reference terminology and core biomedical ontology, covering some 120,000 key biomedical concepts with a rich set of terms, codes, 115,000 textual definitions, and over 400,000 inter-concept relationships. EVS also makes available standalone versions of other terminologies and ontologies of special interest, and provides access with extensive cross-mappings to more than 75 terminologies in the NCI Metathesaurus. EVS publishes NCI Thesaurus (NCIt) as its core reference terminology and biomedical ontology. EVS TerminologyĮVS creates, compiles, and cross-maps biomedical terminology needed by NCI and its community. The EVS Downloads web page offers downloads of EVS terminology content and tools. The EVS Wiki provides extensive details on these and other EVS resources, tools and services. EVS provides the foundational layer for NCI's informatics infrastructure, and plays an important role in federal and international standards efforts (see EVS Use and Collaborations). Since 1997, NCI Enterprise Vocabulary Services (EVS) has provided terminology content, tools, and services to accurately code, analyze and share cancer and biomedical research, clinical and public health information.ĮVS works with many partners to develop, license and publish terminology, jointly develop software tools, and support harmonization and shared standards.
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