Page History

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• Concept definitions are represented in two ways in

  Gloss
  t SNOMED CT release files

  :
  • As a 

    Gloss
    t stated view

     represented by

    Gloss
    t axioms

     that conform to the 

    Gloss
    t OWL Functional Syntax

     distributed in the 

    Specref
    RefType file t OWL Expression Reference Set file

    .
  • As an 

    Gloss
    t inferred view

     represented by 

    Gloss
    t defining relationships

     that are distributed in the 

    Specref
    RefType file t Relationship file

    .
• Concept definitions include two distinct elements
  • Axioms that assert that a concept is a 

    Gloss
    t subtype

     of one or more other concepts. In the 

    Gloss
    t inferred view

     these are represented as 

    Gloss
    t subtype relationships

    .
  • Axioms that assert characteristics of a concept that distinguish it from its 

    Gloss
    t supertypes

    . In the 

    Gloss
    t inferred view

     these are represented as 

    Gloss
    t attribute relationships

    .

Change Notice

• Prior to July 2018 the 

  Gloss
  t stated view

   of concept definitions were represented by relationships in the 

  Specref
  RefType file t Stated Relationships file

  . During a transitional period between July 2018 and July 2019 the OWL reference sets were introduced. Since the end of that transitional period in July 2019, the stated relationship file is no longer maintained or distributed. More information on the earlier representation of the stated view is provided in a historical note on Representation of the Logical Model - Before July 2018.

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