Components: <Original Sub-Identifier (ST)> & <Group (NM)> & <Sequence (NM)> & <Identifier (ST)>
Definition: The components that can be used to define the structure of the observation/result segments (OBX) within an observation report segment (OBR).
Example: Original Mode - |1.3 2| where the dot and space are locally defined; Enhanced Mode - |^1^3^2| where the standard defines the purpose of the components to enable grouping.
Note: In original mode, OG.1 plus OBX-3 provides uniqueness; in enhanced mode OG.2 and OG.3 plus OBX-3 will provide uniqueness; OG.4 may not be present.
Definition: The Original Sub-Identifier component represents the original data type used in OBX-4 to enable backwards compatibility to continue use of the original format to provide OBX segment grouping.
Definition: The Group component indicates the group and its sequence within the OBR segment that the OBX segment is a part of.
Definition: The Sequence component indicates the sequence within the group as defined in OG-2.
Definition: The Identifier component enables assignment of an identifier to a result component, for example an isolate in a microbiology message. Futher guidance on how to use this field will be found in an Implementation Guide.