This concept is the supertype for all SNOMED CT metadata.
Concept Addition Rules
No new subtype children may be added in an extension.
Please refer to the following pages for guidance on the addition of subtype descendants.
Table 18.104.22.168-1 below lists the subtypes of the 900000000000441003 | SNOMED CT Model Component (metadata)| hierarchy, and describes the content within these subhierarchies.
|Subhierarchy||Purpose||Link to More Information|
|Core metadata concept (core metadata concept)|
Provides structural information required to support International Edition data. This supporting information includes sets of enumerated values that apply to attributes of concepts, descriptions and relationships.
|22.214.171.124.1 Core Metadata Hierarchy|
|Foundation metadata concept (foundation metadata concept)|
Provides supporting metadata and structural information for Reference Sets.
|126.96.36.199.2 Foundation Metadata Concept Hierarchy|
|Linkage concept (linkage concept)|
Links two or more concepts together to express compositional meanings. All concept codes that can be used as a Relationship Type are included under | Linkage concept| . The attributes that are approved for use are the Concept Model Attributes.
|188.8.131.52.3 Linkage Concept Hierarchy|
|Namespace concept (namespace concept)|
Contains concepts that represent an assigned Extension namespace identifier.
The following pages provide information about the subtypes of 900000000000441003 | SNOMED CT Model Component (metadata)| . Each page includes tables which describe the purpose of the content within one of the sub-hierarchies, with examples from the International Edition. The tables also state rules about the additions that are permitted in an extension to the respective subhierarchy. Where additions are permitted to the subheirarchy, notes are added on practical uses cases for addition, potential problems that may arise from these additions and any other relevant considerations.