CODEWITHSUNDEEP
hl7-v2
tim_0605
tim_0605

Reputation: 11

HL7 v2 structure

I have a problem with how many instances in the image below are of each segment. I know that the MSH is 1 and the NTE is 0 to many but in the next Segments I am not sure how to deal with that. Is it 1 or 1 to many for ORC? Can anybody tell me the right number of each segment? That would be great.

enter image description here

Upvotes: 1

Views: 214

Answers (2)

Maxime Dupont
Maxime Dupont

Reputation: 23

I confirm Dale's answer.

You can use the Caristix HL7-Definition website to know the trigger event structure and optionality/repetition requirements.

In the Optionality column, R = the segment is required O = the segment is optional

In the Repeatability column, - = not repeatable ∞ = repeatable n = repeatable n times

Upvotes: 0

Dale M
Dale M

Reputation: 843

Brackets [ ] mean the segment is optional.

Braces/curly brackets { } mean the segment may repeat.

MSH           - 1
[{NTE}]       - 0 to many
{ORC          - 1 to many (start of ORC group)
  [OBR        - 0 to 1 (start of OBR group)
    ZDS       - 1 
    [{NTE}]   - 0 to many
    [{DG1}]   - 0 to many
    [{OBX}    - 0 to many (start of OBX group)
      [{NTE}] - 0 to many
    ]         - (end of OBX group)
  ]           - (end of OBR group)
}             - (end of ORC group)

Note the grouping of segments by the matching opening/closing braces and brackets. So in your example, even though ZDS is 1, that only applies if there is an OBR segment.

Similar question here that may be of interest, and it also contains some helpful links.

Upvotes: 1

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