Structure of X12 Envelopes

The actual X12 document structure has hierarchical levels. From highest to the lowest, they are:

• Interchange Envelope

• Functional Group

• Transaction Set

A schematic structure of X12 documents is shown below:

X12 control segments in EDI Tools for .NET

• X12 ISA
• X12 GS
• X12 ST
• X12 SE
• X12 GE
• X12 IEA