A set of one or more 

Notes

• Concept definitions are represented in two ways in The 

  Gloss
  t axioms

   that specify a concept definition are represented in 

  SNOMED CT release files

  : as 
  • As a 

    Gloss
    t

  release files

  • stated view

     represented by

  • Gloss
    t

  SNOMED CT relationships

  • axioms

     that
   or as OWL axioms that
  • conform to the 

    Gloss
    t OWL Functional Syntax

  .

Change Notices

• Before July 2018, all 
  •  distributed in the 

    Specref
    RefType file t OWL Expression Reference Set file

    .
  • As an  were represented as 

    Gloss
    t

  axioms

  • inferred view

     represented by 

  • Gloss
    t defining relationships

  .
  •  that are distributed in the 

    Specref
    RefType file t relationship file

    . The inferred view is generated by applying 

    Gloss
    t description logic classification

     to the stated view.
• Concept definitions include two distinct elementsDuring a transitional period commencing with the July 2018 release of the 

  Gloss
  t International Edition

  , some 

  Gloss
  t axioms

   in 
  • Axioms that assert that a concept is a 

  • Gloss
    t

  stated view

  • subtype

     of one or more other concepts. In
   will be represented using  and at the end of the transitional period all 
  • the 

    Gloss
    t

  OWL functional syntax

  • inferred view

     these are represented as 
   

  • Gloss
    t subtype relationships

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

  • Gloss
    t

  axioms

  • supertypes

   will be represented in this way
  • . In the 

    Gloss
    t

  Inferred

  • inferred view

   
  •  these are represented as 

    Gloss
    t

  axioms will continue to be represented as 

  • 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 Since the end of that transitional period in July 2019, the stated relationship file is no longer maintained or distributed.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.

Alternatives

• Concept definition

Related Links

• Defining relationship
• OWL Expression Reference Set
• Glossary
  

  • Gloss
    t stated view

  • Gloss
    t inferred view

  • Gloss
    t defining relationship

• • Gloss
    t OWL Functional Syntax

• Release File Specifications
  • 4.2.3 Relationship File Specification
  • 5.2.1.9 OWL Expression Reference Set
• Description Logic
  • DOCLPS
  • DOCOWL