How to find the EDI version in a sample EDI file ?

X12 & HIPAA files

x12-version.png

The version is the last element in the GS segment or the ST segment. When present, the version in the ST segment takes precedence.

EDIFACT & EANCOM files

edifact-version.png

The version is the combination of the edition and release component elements following the message type in the UNH segment.