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Question: HL7 v2 case sensitivity

Apr 10, 2013

Question: Are segments in an HL7 message case-sensitive….Example; if I change it from MSH to msh will the message still go through

Answer

Yes. Segments are case sensitive. most parsers will not accept a lowercase segment (in fact, none that i know of).

Generally, all other fixed values in the standard should also be treated as case sensitive unless you are specifically told otherwise.