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Note

icon	false
title	Important 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 alternatefrom assoc iating alternative

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PreSpace	false
t	Identifiers

from various schemes with

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t	SNOMED CT components

.

At any point in time , an alternatewithin alternative

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PreSpace	false
t	Identifier

within a particular scheme will be associated with one and only one . Amay

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PreSpace	false
t	SNOMED CT component

. A

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PreSpace	false
t	SNOMED CT component

may be associated with zero or more alternatewithin mor e alternative

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PreSpace	false
t	Identifiers

within a single scheme.

It is important to note that theand its alternateall the

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t	SNOMED CT component

and it' s alternative

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t	Identifiers

all identify precisely the same real-world object.

Note: The Identifier file is not currently used in theas the

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t	SNOMED CT International Release

as use of the more flexiblestructure flexible

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t	Simple 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
CapType	Table

Identifier file - Detailed Specification

Bookmarked content insert

Start	filespec
Page	REUSE:Identifier File

Only one record with the same

Specref

RefType	(field)
t	identifierSchemeId

and

Specref

RefType	(field)
t	alternateIdentifier

...

Field

...

Data type

...

Immutable

...

Purpose

...

identifierSchemeId (field)

...

SCTID (data type)

...

Y

...

of theenumeration value from the Metadatathat represents the scheme to which thevalue belongs. Set to aof

Scg expression

ShowParts	id+term

900000000000453004|Identifier scheme|

within the metadata.

...

alternateIdentifier (field)

...

String (data type)

...

Y

...

String (data type) representation of the alternatein its native scheme.

...

effectiveTime (field)

...

Time (data type)

...

N

...

Specifies the inclusive date at which the alternatewas associated with the.

...

active (field)

...

Boolean (data type)

...

N

...

Specifies whether the association wasorfrom the point in time specified by the effectiveTime (field) .

...

moduleId (field)

...

SCTID (data type)

...

N

...

Identifies the source module that this association was created in. Set to aof

Scg expression

ShowParts	id+term

900000000000443000|Module|

within the metadata.

...

referencedComponentId (field)

...

SCTID (data type)

...

Y

...

Uniquely identifies thewith which the alternateis associated.

...

Only one record with the same identifierSchemeId (field) and alternateIdentifier (field) 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 thefield the

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PreSpace	false
t	active

field of this record is false ('0'), then the association isat is

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PreSpace	false
t	inactive

at that point in time. If thefield the

Gloss

PreSpace	false
t	active

field is true ('1'), then there is an identity at that point in time between the referencedComponentId

Specref

RefType	(field)
t	referencedComponentId

(a

Gloss

PreSpace	false
t	SNOMED CT component

) and the alternateIdentifier in the scheme identified by identifierSchemeId

Specref

RefType	(field)

.

t

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