18.3.18 OG - observation grouper (2A.3.50)

HL7 Component Table - OG - Observation Grouper

Core Framework									Base Standard Profile
Seq#	Description	Interpretation	Flags	Cardinality	Length	C.LEN	Vocabulary	Data Type	Implement	Cardinality	Vocabulary
OG
1	Original Sub-Identifier			[0..1]				ST
2	Group			[0..1]				NM
3	Sequence			[0..1]				NM
4	Identifier			[0..1]				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.

18.3.18.1 Original Sub-Identifier (ST) (2A.3.50.0)

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.

18.3.18.2 Group (NM) (2A.3.50.1)

Definition: The Group component indicates the group and its sequence within the OBR segment that the OBX segment is a part of.

18.3.18.3 Sequence (NM) (2A.3.50.2)

Definition: The Sequence component indicates the sequence within the group as defined in OG-2.

18.3.18.4 Identifier (ST) (2A.3.50.3)

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.