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A combination of an attribute name and an attribute value used to represent a specific type of information in a generic way without altering the underlying structure of an information model. The attribute name identifies the type of information and the attribute value provides a value.


Attribute value pairs are used by SNOMED CT in relationships and postcoordinated expressions. In both cases, the attribute name and attribute value are expressed using SNOMED CT concept identifiers. In the Relationship file, the attribute name if represented by the Relationship.typeId and the attribute value by the Relationship.destinationId.