Instance Identifier (II)
Instance Identifier (II)
This data type identifies instances of classes like observations or entities (persons, organizations). Attributes are
Attribute | DT | Conf | Description |
---|---|---|---|
@extension | st | O | Identification |
@root | uid | R | Source of identification |
<id extension="13234453645" root="2.16.840.1.113883.2.6.15.3.427.1"/>
The @root
attribute is of type OID (object identifier), a unique identifier of the issuing authority or system.
Example |
For example, a patient with a patient number 13234453645 created by a specific healthcare provider organization is uniquely identified by the number itself in |
In some cases a single OID identifies an object uniquely. In that situation, only @root
is populated and @extension
is omitted.