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Note
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titleImportant Note

The Identifier File does not contain any data in the SNOMED CT International Release
The file structure is documented here only as a point of reference for others who may be using the files in an extension release.

This file provides a standardized way of associating alternate Identifiers assoc iating alternative 

Gloss
PreSpacefalse
tIdentifiers
from various schemes with
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tSNOMED CT components
.

At any point in time , an alternate Identifier alternative

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PreSpacefalse
tIdentifier
within a particular scheme will be associated with one and only one
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PreSpacefalse
tSNOMED CT component
. A
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PreSpacefalse
tSNOMED CT component
may be associated with zero or more alternate Identifiers mor e alternative
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PreSpacefalse
tIdentifiers
within a single scheme.

It is important to note that the

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tSNOMED CT component
and its alternate Identifiers
and it' s alternative
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tIdentifiers
all identify precisely the same real-world object.

Note: The Identifier file is not currently used in the

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tSNOMED CT International Release
as use of the more flexible
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tSimple map type references set
structure is preferred for links to alternative codes. The only known current use of this file is for internal identification of components during the content development process.

Caption label

...

CapId

...

identifier-

...

file-

...

 

...

 

...

 

detailed-specification
CapTypeTable
Identifier file - Detailed Specification


Bookmarked content insert
Startfilespec
PageREUSE:Identifier File

Only one record with the same

Specref
RefType(field)
tidentifierSchemeId
and
Specref
RefType(field)
talternateIdentifier

...

Field

...

Data type

...

Immutable

...

Purpose

...

 

...

identifierSchemeId

...

SCTID

...

Y

...

Identifier of the concept enumeration value from the Metadata hierarchy that represents the scheme to which the Identifier value belongs. Set to a descendant of 900000000000453004 $$ Identifier scheme $$ within the metadata hierarchy .

...

 

...

alternateIdentifier

...

String

...

Y

...

String representation of the alternate Identifier in its native scheme.

...

 

...

effectiveTime

...

Time

...

N

...

Specifies the inclusive date at which the alternate Identifier was associated with the SNOMED CT component .

...

 

...

active

...

Boolean

...

N

...

Specifies whether the association was active or inactive from the point in time specified by the effectiveTime .

...

 

...

moduleId

...

SCTID

...

N

...

Identifies the source module that this association was created in. Set to a child of 900000000000443000 $$ Module $$ within the metadata hierarchy .

...

 

...

referencedComponentId

...

SCTID

...

Y

...

Uniquely identifies the SNOMED CT component with which the alternate Identifier is associated.

...

 

Only one record with the same identifierSchemeId and alternateIdentifier fields will be current at any point in time. The current record will be the one with the most recent effectiveTimebefore effectiveTime before or equal to the point in time under consideration.

If the

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tactive
field of this record is false ('0'), then the association is
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tinactive
at that point in time. If the
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PreSpacefalse
tactive
field is true ('1'), then there is an identity at that point in time between the
Specref
RefType(field)
treferencedComponentId
 (a
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PreSpacefalse
tSNOMED CT component
) and the alternateIdentifier in the scheme identified by
Specref
RefType(field)
tidentifierSchemeId
. Related Links

...

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