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.
At any point in time , an alternative Identifierwithin a particular scheme will be associated with one and only one SNOMED CT component. A SNOMED CT componentmay be associated with zero or more alternative Identifierswithin a single scheme.
Note: The Identifier file is not currently used in the SNOMED CT International Releaseas use of the more flexible Simple map type references setstructure 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.
|Part of Primary Key|
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 effectiveTime before or equal to the point in time under consideration.
If the activefield of this record is false ('0'), then the association is inactiveat that point in time. If the activefield is true ('1'), then there is an identity at that point in time between the referencedComponentId (a SNOMED CT component) and the alternateIdentifier in the scheme identified by identifierSchemeId.