Release File Specification

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Each SCTID

Specref
RefType(data type)
tSCTID
identifies a . Theitself
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tSNOMED CT component.
The identifier itself does not contain information related to the meaning of aor. a
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tconcept
or
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tdescription.
This means it is not possible to infer anything about the meaning of afrom a
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tconcept
from the numeric value of theor the identifier or from the sequence of digits in that form of the identifer. The meaning of acan be determined fromto otherand from associatedthat a
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tconcept
can be determined from
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trelationships
to other
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tconcepts
and from associated
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tdescriptions
that include human readable terms.

The SCTID

Specref
RefType(data type)
does
tSCTID
 does however have a structure which includes valuable information about the nature and source of the identified component and the validity of the identifier. This structure supports the following features:

  • Gloss
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    tCheck-digit
    validation of the identifier.

    • The

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      tcheck-digit
      is Theis the final digit in the decimal rendering of the identifier. This can be checked to minimize errors from transcription or incomplete copy-paste actions.

  • Partitioning betweenfor between identifiers for different types of . Anchor_aa354275-548c-4058-9bd0-8ac50216229c__2_aa354275-548c-4058-9bd0-8ac50216229c__2

    Gloss
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    tSNOMED CT component.

    • A two-digit

      Gloss
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      tpartition identifier
      distinguishes the identifiers of A two-digitdistinguishes theof different component types and prevents the samefrom same identifier from being allocated to both aand a. a
      Gloss
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      tconcept
      and a
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      tdescription.
      As a result, when an SCTID
      Specref
      RefType(data type)
      is
      tSCTID
       is read from a record or other resource, it is possible to determine whether it represents a , aor a,
      Gloss
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      tconcept,
      a
      Gloss
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      trelationship
      or a
      Gloss
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      tdescription,
      before searching for the identified component.

  • Namespaces to separate componentoriginated component identifiers originated by different organizations. Anchor_aa354275-548c-4058-9bd0-8ac50216229c__4_aa354275-548c-4058-9bd0-8ac50216229c__4 

    • Organizations are only permitted to issuewhich issue identifiers which fall within a specified namespace of potentialvaluespotential identifier values. This prevents collisions betweenissues between identifiers issues by different organizations which would otherwise result in ambiguity and errors when sharing data.

    • There are two formats used for representing namespaces. Anchor_aa354275-548c-4058-9bd0-8ac50216229c__a 

      • Short format in which

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        tpartition identifiers
        are

      _aa354275-548c-4058-9bd0-8ac50216229c__a

      • Short format in whichare reserved for an organization which is permitted to issue any validwithin valid identifiers within the allocated partitions. The short format approach does not require a specificand specific

        Gloss
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        tnamespace identifier
        and is only applicable to components originated and maintained by theas part of theofthe
        Gloss
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        tSNOMED International
        as part of the
        Gloss
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        tInternational Release
        of
        Gloss
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        tSNOMED CT.

      • Long format in which thevalue the

        Gloss
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        tpartition identifier
        value indicates that a separateis separate
        Gloss
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        tnamespace identifier
        is required to distinguish between components originated as part of ancreated an
        Gloss
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        textension
        created by an appropriately authorized organization .

anchor   Image Added_aa354275-548c-4058-9bd0-8ac50216229c__7_aa354275-548c-4058-9bd0-8ac50216229c__7 Anchor_aa354275-548c-4058-9bd0-8ac50216229c__f_aa354275-548c-4058-9bd0-8ac50216229c__f Image Removed

Figure 28. SCTID Short Format - Applicable to components originating from the International Release

...

Caption label
CapIdsctid-short-format-applicable-to-components-originating-from-the-international-release
CapTypeFigure
SCTID Short Format - Applicable to components originating from the International Release


  Image Added

Caption label
CapIdsctid-long-format-applicable-to-components-originating-from-a-snomed-ct-extension
CapTypeFigure
SCTID Long Format - Applicable to components originating from a SNOMED CT Extension
Info

The

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tSNOMED International
allocates
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tnamespace identifiers
to organizations such as
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tMembers
and
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tAffiliates
to

...

Figure 29. SCTID Long Format - Applicable to components originating from a SNOMED CT Extension

...

enable them to create content and or derivatives in an

...

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textension.
The
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tnamespace identifiers
enables unique 
Specref
RefType

(data type)

...

tSCTID
 to be issued by many organizations and allow

...

each 

Specref
RefType

(data type)

...

tSCTID
 to be traced to an authorized originating organization.