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Anchor
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The Concept
Glossary ref
Gloss
Spacetrue
tConcept file
includes a special
Glossary ref
Gloss
Spacetrue
tconcept
referred to as the glossary-ref
Gloss
tRoot
Concept
. It is the "root" of the main hierarchy that contain all the
Glossary ref
Gloss
Spacetrue
tConcepts
in glossary-ref
Gloss
tSNOMED
CT
.

All other

Glossary ref
Gloss
Spacetrue
tConcepts
are descended from this "root"
Glossary ref
Gloss
Spacetrue
tconcept
via at least one series of
Glossary ref
Gloss
Spacetrue
tRelationships
of the
Glossary ref
Relationship Type
Scg expression
ShowPartsterm
Gloss
Spacetrue
tRelationship Type
Concept
t116680003|is
a|
(i.e. all other
Glossary ref
Gloss
Spacetrue
tConcepts
are regarded as subclasses of this glossary-ref
Gloss
tConcept
).

The Root

Glossary ref
Gloss
Spacetrue
tRoot Concept
Code is scg-expression
Concept
ShowParts
t
id
138875005|SNOMED
CT
Concept
(SNOMED
RT+CTV3)|
ShowFormatinline
and is named scg-expression
Concept
ShowParts
t
term
138875005|SNOMED
CT
Concept|
.

Features of the root Concept

Anchor
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All other SNOMED CT
Glossary ref
Gloss
Spacetrue
tSNOMED CT Concepts
are
Glossary ref
Gloss
Spacetrue
tsubtypes
of the root glossary-ref
Gloss
tconcept
.

Unlike other

glossary-ref
Gloss
tSNOMED
CT
Concepts
, the root
Glossary ref
Gloss
Spacetrue
tconcept
is not a
Glossary ref
Gloss
Spacetrue
tsubtype
of any other glossary-ref
Gloss
tconcept
.

Release information in the root Concept

Anchor
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_0062303b-3d01-434a-b530-376c97a57186
The root
Glossary ref
Gloss
Spacetrue
tConcept
has a current
Glossary ref
Gloss
Spacetrue
tSynonym
that contains information about the release. The glossary-ref
Gloss
tSynonyms
, representing earlier releases, are distributed as glossary-ref
Gloss
tInactive
Descriptions
. The release information is represented in the
Glossary ref
Gloss
Spacetrue
tterm
text of the
Glossary ref
Gloss
Spacetrue
tSynonym
as indicated in .

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Example

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Caption table
Representation of release information in the root Concept

SNOMED Clinical

Example

Gloss
Spacetrue
tSNOMED Clinical Terms
version: 20020131 [R] (first release)

 

Stylized form

Glossary ref
Gloss
Spacetrue
tSNOMED Clinical Terms
version: yyyymmdd [ status] ( glossary-ref
Gloss
tdescription
)

 

 

yyyymmdd

The release date in

Glossary ref
Gloss
Spacetrue
tISO
format.

 

Status

R (release), D (developmental) or E (evaluation).

 

glossary-ref

Gloss
tDescription

An optional free text

Glossary ref
Gloss
Spacetrue
tdescription
of the release.

Top-level Concepts

Anchor
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_22772230-3d7f-11e2-a25f-0800200c9a66
Glossary ref
Gloss
Spacetrue
tConcepts
that are directly related to the Root
Glossary ref
Gloss
Spacetrue
tRoot Concept
by a single
Glossary ref
Gloss
Spacetrue
tRelationship
of the
Glossary ref
Relationship Type
Scg expression
ShowPartsterm
Gloss
Spacetrue
tRelationship Type
Concept
t116680003|is
a|
ShowFormatinline
are referred to as "Top Level glossary-ref
Gloss
tConcepts
". All other
Glossary ref
Gloss
Spacetrue
tconcepts
are descended from at least one Top Level
Glossary ref
Gloss
Spacetrue
tConcept
via at least one series of
Glossary ref
Gloss
Spacetrue
tRelationships
of the Scg expression
ShowPartsterm
Glossary ref
Relationship Type
Gloss
Spacetrue
tRelationship Type
Concept
t116680003|is
a|
(i.e. all other
Glossary ref
Gloss
Spacetrue
tconcepts
represent subclasses of the meaning of at least one Top Level glossary-ref
Gloss
tConcept
).

Many Top-level

Glossary ref
Gloss
Spacetrue
tConcepts
are intended to represent things outside of glossary-ref
Gloss
tSNOMED
CT
(including processes, events, and material entities) in the real world. These include:

Table 2. Top Level Concepts

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ShowPartsterm

Caption table
Top Level Concepts

  • Concept
    t404684003|Clinical
    finding|

  • scg-expression

    Concept
    ShowParts
    t
term
71388002|Procedure|
scg-expression

  • Concept
    ShowParts
    t
    term
    363787002|Observable
    entity|

  • scg-expression

    Concept
    ShowParts
    t
    term
    123037004|Body
    structure|
    scg-expression

  • Concept
    ShowParts
    t
    term
    410607006|Organism|

  • scg-expression

    Concept
    ShowParts
    t
    term
    105590001|Substance|
    scg-expression

  • Concept
    ShowParts
    t
    term
    373873005|Pharmaceutical
    /
    biologic
    product|

  • scg-expression

    Concept
    ShowParts
    t
    term
    123038009|Specimen|
    scg-expression

  • Concept
    ShowParts
    t
    term
    370115009|Special
    concept|

  • scg-expression

    Concept
    ShowParts
    t
    term
    900000000000441003|SNOMED
    CT
    Model
    Component|
    scg-expression

    • Concept
      ShowParts
      t
      term
      78621006|Physical
      force|

    • scg-expression

      Concept
      ShowParts
      t
      term
      272379006|Event|
      scg-expression

    • Concept
      ShowParts
      t
      term
      308916002|Environment
      or
      geographical
      location|

    • scg-expression

      Concept
      ShowParts
      t
      term
      48176007|Social
      context|
      scg-expression

    • Concept
      ShowParts
      t
      term
      243796009|Situation
      with
      explicit
      context|

    • scg-expression

      Concept
      ShowParts
      t
      term
      254291000|Staging
      and
      scales|
      scg-expression

    • Concept
      ShowParts
      t
      term
      260787004|Physical
      object|

    • scg-expression

      Concept
      ShowParts
      t
      term
      362981000|Qualifier
      value|
      scg-expression

    • Concept
      ShowParts
      t
      term
      419891008|Record
      artifact|

    Representation of top-level Concepts

    Anchor
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    Awareness of the top-level
    Glossary ref
    Gloss
    Spacetrue
    tConcepts
    is likely to be particularly important when developing technical implementations.

    A top-level

    Glossary ref
    Gloss
    Spacetrue
    tConcept
    can be identified by the fact that it has a single
    Glossary ref
    subtype
    Glossary ref
    Gloss
    Spacetrue
    tsubtype
    Gloss
    Spacetrue
    trelationship
    referring to the glossary-ref
    Gloss
    tRoot
    Concept
    . However, to minimize processing requirements the top-level
    Glossary ref
    Gloss
    Spacetrue
    tConcepts
    have designated Concept
    Glossary ref
    Gloss
    Spacetrue
    tConcept Identifiers
    that are documented in this guide as 4.6. Important Concept Identifiers#_bca63bef-94da-474e-8a09-7b3461ca8904Identifiers.

    Top Level Metadata Concepts

    Anchor
    _f7141460-3d81-11e2-a25f-0800200c9a66
    _f7141460-3d81-11e2-a25f-0800200c9a66
    Metadata codes represent structural information about the terminology itself. The Top Level Metadata
    Glossary ref
    Gloss
    Spacetrue
    tConcepts
    represent broad groups of metadata.

    Table 3. Top Level Metadata

    ...

    ShowPartsterm

    Caption table
    Top Level Metadata

    • Concept
      t900000000000442005|Core
      metadata
      concept|

    • scg-expression

      Concept
      ShowParts
      t
    term
    900000000000454005|Foundation
    metadata
    concept|
    scg-expression

  • Concept
    ShowParts
    t
    term
    106237007|Linkage
    concept|

  • scg-expression

    Concept
    ShowParts
    t
    term
    370136006|Namespace
    concept|

  • General Links

    6.8.14 Core metadata concept

    6.8.15 Foundation metadata concept