• Tim Benson
  • Grahame Grieve
Part of the Health Information Technology Standards book series (HITS)


SNOMED CT is a comprehensive multilingual clinical terminology used in electronic health records and interoperability. Its components are concepts (codes), descriptions (terms) and relationships. Concepts are organized into hierarchies. SNOMED CT expressions are either a single concept (pre-coordinated) or more complex post-coordinated expressions using compositional grammar. Reference sets are used to provide subsets of the whole terminology for specific purposes.


SNOMED CT Components Concept Description Relationship SctId Defining relationship Qualifying relationship Hierarchy Description logic Expression Compositional grammar Pre-coordination Post-coordination Subtype qualification Axis modification Subsumption testing Transitive closure table Reference set Language reference set Navigation reference set Map reference set Release format 2 (RF2) Delta release SNOMED CT documentation 


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© Springer-Verlag London 2016

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Authors and Affiliations

  • Tim Benson
    • 1
  • Grahame Grieve
    • 2
  1. 1.R-Outcomes LtdNewburyUK
  2. 2.Health Intersections Pty LtdMelbourneAustralia

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