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Core Metadata Concept

Hierarchy

Purpose

This concept is the supertype for metadata used directly by SNOMED CT components.

Concept Addition Rules

No new subtype children may be added in an extension.

See tables below for concept addition rules for each of the subtypes of 900000000000442005 | Core metadata concept| .

Characteristic Type

Hierarchy

Purpose

This subhierarchy provides the values for Relationship.characteristicTypeId.

Examples

Concept Addition Rules

No new subtype descendants may be added in an extension.

Definition Status

Hierarchy

Purpose

This subhierarchy provides the values for Concept.definitionStatusId

Examples

Concept Addition Rules

No new subtype descendants may be added in an extension.

Description Type

Hierarchy

Purpose

This subhierarchy provides the values for Description.typeId

Examples

Concept Addition Rules

Additional types permitted provided these are additive and do not replace the synonym or fully specified name values

Concept Addition Uses Cases

  • Different lengths of text for different purposes
  • Different formats for text including HTML
  • Specialized usage of text for a specific purpose

Modifier

Hierarchy

Purpose

This subhierarchy provides the values for Relationship.modifierId

Examples

Concept Addition Rules

No new subtype descendants may be added in an extension.

Module

Hierarchy

Purpose

This subhierarchy provides the concepts used to identify modules

Examples

Concept Addition Rules

The addition of modules that form part of the extension is required. These new module concepts must either be direct children of 900000000000443000 | Module| or descendants of a child of 900000000000443000 | Module| that is owned by the same extension provider. It is not permitted to add modules as subtypes of modules maintained by another extension provider.

Each module concept added within an extension must have an identifier that contains the extension's namespace identifier.

Concept Addition Uses Cases

The addition of at least one module concept is essential for all extensions. More than one module concept may be added to enable content to be organized into separate modules.


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