SNOMED CT Full OWL Axiom Reference Set

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This dataset is an OWL (Ontology Web Language) axiom reference set (foundation metadata concept), in which the OWL expressions represent axioms that form part of the definition of the concept identified by the ‘Referenced Component Id’.


A 762676003 |OWL (Ontology Web Language) expression type reference set| associates description logic statements with SNOMED CT concept in the OWL functional syntax. The SNOMED CT International Release contains two reference sets that follow the 762676003 |OWL expression type reference set| pattern:

– The 733073007 |OWL axiom reference set (foundation metadata concept)|, in which the OWL expressions represent and axioms that form part of the definition of the concept identified by the referencedComponentId.
– The 762103008 |OWL ontology reference set (foundation metadata concept)|, in which the OWL expressions represent essential information about an ontology. This information includes namespaces, ontology URI (Uniform Resource Identifier), ontology version URI, and import statements. The 762103008 |OWL ontology reference set (foundation metadata concept)| enables the use of prefixes in the ontology.

SNOMED CT (SNOMED Clinical Terminology) provides a common language that assists with the electronic exchange of clinical health information. It enables a consistent way of indexing, storing, retrieving, and aggregating clinical data across specialties and sites of care. SNOMED CT Can be mapped to other coding systems, such as ICD-10, which helps facilitate semantic interoperability.

A Full release contains every version of every component that has ever been released prior to or in the specified Edition. This release provides a full historical record and can be used to obtain views of the state of any component at any point in time since its first release.

In addition to 623 new concepts specific for the US, the September 2018 SNOMED CT US Edition also contains all of the content from the July 2018 SNOMED CT International Edition. Approximately 543 requests for terminology additions and updates were submitted via the US Content Request System (US CRS) to support US clinical health information data exchange. This latest version of the US Edition also includes the SNOMED CT to ICD-10-CM reference set, with over 123,000 SNOMED CT source concepts mapped to ICD-10-CM targets.

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Spatial Coverage

United States


John Snow Labs; International Health Terminology Standards Development Organisation (IHTSDO), U.S. National Library of Medicine (NLM);

Source License URL

Source License Requirements

Reporting Requirements

Source Citation



Clinical Terminology, SNOMED CT, IHTSDO, Systematized Nomenclature of Medicine Clinical Terms, Healthcare Terminology, Electronic Health Records, Machine Readable Concept Model

Other Titles

SNOMED CT United States Edition, SNOMED CT Latest Version, Machine Readable Concept Model of SNOMED CT

Reference_Set_Member_IdA field, uniquely identifying this reference set member. Different versions of a reference set member share the same ID but have different Effective_Date. This allows a reference set member to be modified or made inactive (i.e. removed from the active set) at a specified time.stringrequired : 1
Effective_DateThe inclusive date at which this version of the identified reference set member became the current version.daterequired : 1
Is_ActiveThe state of the identified reference set member as at the specified Effective_Date. If active= true, the reference set member is part of the current version of the set, if active=false, the reference set member is not part of the current version of the set.booleanrequired : 1
Module_IdIdentifies the SNOMED CT module that contains this reference set member as at the specified Effective_Date.integerrequired : 1 level : Nominal
Refset_IdIdentifies the reference set to which this reference set member belongs.integerrequired : 1 level : Nominal
Referenced_Component_IdThe identifier of the source component of the association. The concept to which the OWL expression applies. In the case of the 733073007 |OWL axiom reference set (foundation metadata concept)|, the axiom contributes to the definition of the identified concept.integerrequired : 1 level : Nominal
OWL_ExpressionThe text of OWL expression to attach to the component identified by Referenced_Component_Id.stringrequired : 1
b8074e53-7157-4f2c-826f-c9019afbff882018-07-31true900000000000012004733073007246093002SubObjectPropertyOf(ObjectPropertyChain(:246093002 :738774007) :246093002)
b8074e53-7157-4f2c-826f-c9019afbff882018-07-31true900000000000012004733073007246093002SubObjectPropertyOf(ObjectPropertyChain(:246093002 :738774007) :246093002)
b8074e53-7157-4f2c-826f-c9019afbff882018-07-31true900000000000012004733073007246093002SubObjectPropertyOf(ObjectPropertyChain(:246093002 :738774007) :246093002)
b8074e53-7157-4f2c-826f-c9019afbff882018-07-31true900000000000012004733073007246093002SubObjectPropertyOf(ObjectPropertyChain(:246093002 :738774007) :246093002)