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Authorities used in ClinVar

A major function of ClinVar is to harmonize submissions from diverse sources by converting data elements to standard terms and/or public database identifiers.  This page summarizes how different elements are managed, and provides links to current authoritative content.

  1. Nomenclature
  2. Ontologies
  3. HGVS
  4. Clinical significance


ClinVar uses official terminology when available. The authorities for names of conditions and clinical features, genes, and proteins are detailed on our Nomenclature page.  The nomenclature is shared among ClinVar, Gene, and the NIH Genetic Testing Registry (GTR).


Sequence Ontology

The European Bioinformatics Institute (EBI) and NCBI collaborate on standardizing the representation of types of variation and their molecular consequences according to the Sequence Ontology. The identifiers for the terms are referenced in ClinVar. More...


ClinVar uses Variation Ontology to represent the effects and consequences of variation.


ClinVar represents variation according to the HGVS standard. Submitters may describe variants as HGVS expressions on genomic DNA or cDNA reference sequences, or as sequence changes relative to top-level genomic sequences defined by the Genome Reference Consortium or NCBI's Reference sequences.  ClinVar then computes alternate expressions, and reports the results in specific types as detailed here.


ClinVar adheres to standards for classification terms when they are available.

Please see our documentation on classification for more details.

Last updated: 2024-03-20T22:23:28Z