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As the release file formats contain a number of concept enumerations, it is necessary to define sets of concepts that represent the allowed values. As well as the enumerated values, other metadata supporting the extensibility mechanism and the concept model is required.

The concept

Scg expression

ShowParts	term

900000000000441003|SNOMED CT Model Component

$$ SNOMED CT Model Component

(metadata)

$$

is a subtype of the root concept ( $$ SNOMED CT Concept $$ (

Scg expression

ShowParts	term

138875005|SNOMED CT Concept|

), and contains the metadata, supporting the release.

The subtypes of of

Scg expression

ShowParts	term

900000000000441003|SNOMED CT Model Component

$$ SNOMED CT Model Component

(metadata)

$$

are described in and the top three levels of the hierarchy are shown in .

Concepts Relationships concepts ( $$ Attribute $$ $$ Link assertion $$ )Concepts that specify the Extension IHTSDO Concepts International Release Concept Description Relationship files Reference Sets Guide .

Anchor

	_1adc7adf-42b5-436a-b85e-964cab9ad6a9__6
	_1adc7adf-42b5-436a-b85e-964cab9ad6a9__6

Table 15. SNOMED CT Model Component (metadata) (900000000000441003)

Id

Term

Comment

Scg expression

ShowParts	id

106237007|Linkage concept (linkage concept)|

Scg expression

ShowParts	id

106237007|Linkage concept (linkage concept)|

that specify

Semantic

between

(
Scg expression
ShowParts term
246061005|Attribute|
); and
Asserted associations between statements in a record (

Scg expression
ShowParts term
416698001|Link assertion|
)

Scg expression

ShowParts	id

370136006|Namespace concept (namespace concept)|

Scg expression

ShowParts	id

370136006|Namespace concept (namespace concept)|

that specify the

370136006

Namespace concept

Namespaces allocated by the

.

Scg expression

ShowParts	id

900000000000442005|Core metadata concept (core metadata concept)|

Scg expression

ShowParts	id

900000000000442005|Core metadata concept (core metadata concept)|

that are referenced from enumerated fields within the

files (the

,

, Identifier

file ).

Scg expression

ShowParts	id

900000000000454005|Foundation metadata concept (foundation metadata concept)|

Scg expression

ShowParts	id

900000000000454005|Foundation metadata concept (foundation metadata concept)|

The metadata that supports the extensibility mechanism, and is discussed in more detail in the

.

Scg expression
ShowParts id+term
138875005|SNOMED CT Concept|
138875005 $$ SNOMED CT Concept $$
- ... (content hierarchies) ...
- Scg expression
  ShowParts id+term
  900000000000441003
  $$
  |SNOMED CT Model
  Component $$
  Component|
  - Scg expression
    ShowParts id+term
    106237007
    $$
    |linkage
    concept $$
    concept|
    - Scg expression
      ShowParts id+term
      246061005
      $$
      |attribute
      $$
      |
      ...
    - Scg expression
      416698001 $$ link assertion $$
      ShowParts id+term
      416698001|link assertion|
      ...
  - Scg expression
    ShowParts id+term
    370136006
    $$
    |namespace concept
    $$
    |
    ...
  - Scg expression
    ShowParts id+term
    900000000000442005
    $$
    |core metadata
    concept $$
    concept|
    - Scg expression
      ShowParts id+term
      900000000000443000
      $$ module $$
      |module|
      - Scg expression
        ShowParts id+term
        900000000000445007
        $$
        |IHTSDO maintained module
        $$
        |
        ...
    - Scg expression
      900000000000444006 $$ definition status $$
      ShowParts id+term
      900000000000444006|definition status|
      Anchor
      _1adc7adf-42b5-436a-b85e-964cab9ad6a9__7
      _1adc7adf-42b5-436a-b85e-964cab9ad6a9__7
      - Scg expression
        ShowParts id+term
        900000000000073002
        $$ defined $$
        |defined|
      - Scg expression
        ShowParts id+term
        900000000000074008
        $$ primitive $$
        |primitive|
    - Scg expression
      ShowParts id+term
      900000000000446008
      $$
      |description type
      $$
      |
      Anchor
      _1adc7adf-42b5-436a-b85e-964cab9ad6a9__c
      _1adc7adf-42b5-436a-b85e-964cab9ad6a9__c
      - Scg expression
        ShowParts id+term
        900000000000003001
        $$
        |fully specified
        name $$
        name|
      - Scg expression
        ShowParts id+term
        900000000000013009
        $$ synonym $$
        |synonym|
      - Scg expression
        ShowParts id+term
        900000000000550004
        $$ definition $$
        |definition|
    - Scg expression
      ShowParts id+term
      900000000000447004
      $$
      |case
      significance $$
      significance|
      - Scg expression
        ShowParts id+term
        900000000000017005
        $$
        |case
        sensitive $$
        sensitive|
      - Scg expression
        ShowParts id+term
        900000000000020002
        $$
        |only initial character case
        insensitive $$
        insensitive|
      - Scg expression
        ShowParts id+term
        900000000000448009
        $$
        |case
        insensitive $$
        insensitive|
    - Scg expression
      ShowParts id+term
      900000000000449001
      $$
      |characteristic type
      $$
      |
      Anchor
      _1adc7adf-42b5-436a-b85e-964cab9ad6a9__d
      _1adc7adf-42b5-436a-b85e-964cab9ad6a9__d
      - Scg expression
        ShowParts id+term
        900000000000006009
        $$
        |defining relationship
        $$
        |
        ...
      - Scg expression
        ShowParts id+term
        900000000000225001
        $$
        |qualifying
        relationship $$
        relationship|
      - Scg expression
        ShowParts id+term
        900000000000227009
        $$
        |additional
        relationship $$
        relationship|
    - Scg expression
      ShowParts id+term
      900000000000450001
      $$ modifier $$
      |modifier|
      - Scg expression
        ShowParts id+term
        900000000000451002
        $$ some $$
        |some|
      - Scg expression
        ShowParts id+term
        900000000000452009
        $$ all $$
        |all|
    - Scg expression
      ShowParts id+term
      900000000000453004
      $$
      |identifier scheme
      $$
      |
      Anchor
      _1adc7adf-42b5-436a-b85e-964cab9ad6a9__f
      _1adc7adf-42b5-436a-b85e-964cab9ad6a9__f
      - Scg expression
        ShowParts id+term
        900000000000002006
        $$
        |SNOMED CT
        UUID $$
        UUID|
      - Scg expression
        ShowParts id+term
        900000000000294009
        $$
        |SNOMED CT integer
        identifier $$
        identifier|
  - Scg expression
    ShowParts id+term
    900000000000454005
    $$
    |foundation metadata concept
    $$
    |
    - Anchor
      _1adc7adf-42b5-436a-b85e-964cab9ad6a9__a
      _1adc7adf-42b5-436a-b85e-964cab9ad6a9__a
      Scg expression
      ShowParts id+term
      900000000000455006
      $$
      |reference set
      $$
      |
      Anchor
      _1adc7adf-42b5-436a-b85e-964cab9ad6a9__2
      _1adc7adf-42b5-436a-b85e-964cab9ad6a9__2
      - Scg expression
        ShowParts id+term
        900000000000456007|reference set descriptor|
      - Scg expression
        ShowParts id+term
        900000000000480006|attribute value type|
        ...
      - Scg expression
        ShowParts id+term
        900000000000496009|simple map|
        ...
      - Scg expression
        ShowParts id+term
        900000000000506000|language type|
        ...
      - Scg expression
        ShowParts id+term
        900000000000512005|query specification type|
        ...
      - Scg expression
        ShowParts id+term
        900000000000516008|annotation type|
        ...
      - Scg expression
        ShowParts id+term
        900000000000521006|association type|
        ...
      - Scg expression
        ShowParts id+term
        900000000000534007|module dependency|
      - Scg expression
        ShowParts id+term
        900000000000538005|description format|
      - 900000000000456007 $$ reference set descriptor $$
      - 900000000000480006 $$ attribute value type $$ ...
      - 900000000000496009 $$ simple map $$ ...
      - 900000000000506000 $$ language type $$ ...
      - 900000000000512005 $$ query specification type $$ ...
      - 900000000000516008 $$ annotation type $$ ...
      - 900000000000521006 $$ association type $$ ...
      - 900000000000534007 $$ module dependency $$
      - 900000000000538005 $$ description format $$
    - Anchor
      _1adc7adf-42b5-436a-b85e-964cab9ad6a9__3
      _1adc7adf-42b5-436a-b85e-964cab9ad6a9__3
      900000000000457003 $$ reference set attribute $$
      Scg expression
      ShowParts id+term
      900000000000457003|reference set attribute|
      Anchor
      _1adc7adf-42b5-436a-b85e-964cab9ad6a9__4
      _1adc7adf-42b5-436a-b85e-964cab9ad6a9__4
      - Scg expression
      - 900000000000458008 $$ attribute description $$
      - 900000000000459000 $$ attribute type $$ ...
      - 900000000000479008 $$ attribute order $$
      - 900000000000491004 $$ attribute value $$ ...
      - 900000000000499002 $$ scheme value $$
      - 900000000000500006 $$ map source concept $$
      - 900000000000501005 $$ map group $$
      - 900000000000502003 $$ map priority $$
      - 900000000000503008 $$ map rule $$
      - 900000000000504002 $$ map advice $$
      - 900000000000505001 $$ map target $$
      - 900000000000510002 $$ description in dialect $$
      - 900000000000511003 $$ acceptability $$ ...
      - 900000000000514006 $$ generated reference set $$
      - 900000000000515007 $$ query $$
      - 900000000000518009 $$ annotated component $$
      - 900000000000519001 $$ annotation $$ ...
      - 900000000000532006 $$ association source component $$
      - 900000000000533001 $$ association target component $$
      - 900000000000535008 $$ dependency target $$
      - 900000000000536009 $$ source effective time $$
      - 900000000000537000 $$ target effective time $$
      - 900000000000539002 $$ description format $$ ...
      - ShowParts id+term
        900000000000458008|attribute description|
      - Scg expression
        ShowParts id+term
        900000000000459000|attribute type|
        ...
      - Scg expression
        ShowParts id+term
        900000000000479008|attribute order|
      - Scg expression
        ShowParts id+term
        900000000000491004|attribute value|
        ...
      - Scg expression
        ShowParts id+term
        900000000000499002|scheme value|
      - Scg expression
        ShowParts id+term
        900000000000500006|map source concept|
      - Scg expression
        ShowParts id+term
        900000000000501005|map group|
      - Scg expression
        ShowParts id+term
        900000000000502003|map priority|
      - Scg expression
        ShowParts id+term
        900000000000503008|map rule|
      - Scg expression
        ShowParts id+term
        900000000000504002|map advice|
      - Scg expression
        ShowParts id+term
        900000000000505001|map target|
      - Scg expression
        ShowParts id+term
        900000000000510002|description in dialect|
      - Scg expression
        ShowParts id+term
        900000000000511003|acceptability|
        ...
      - Scg expression
        ShowParts id+term
        900000000000514006|generated reference set|
      - Scg expression
        ShowParts id+term
        900000000000515007|query|
      - Scg expression
        ShowParts id+term
        900000000000518009|annotated component|
      - Scg expression
        ShowParts id+term
        900000000000519001|annotation|
        ...
      - Scg expression
        ShowParts id+term
        900000000000532006|association source component|
      - Scg expression
        ShowParts id+term
        900000000000533001|association target component|
      - Scg expression
        ShowParts id+term
        900000000000535008|dependency target|
      - Scg expression
        ShowParts id+term
        900000000000536009|source effective time|
      - Scg expression
        ShowParts id+term
        900000000000537000|target effective time|
      - Scg expression
        ShowParts id+term
        900000000000539002|description format|
        ...
      - Scg expression
        ShowParts id+term
        900000000000544009|description length|
        900000000000544009 $$ description length $$

Figure 2. SNOMED CT Metadata Hierarchy (2010-07-31)

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