EDI 270–5010 Documentation - ST – Transaction Set Header

ST – Transaction Set Header

Loop Seg ID Segment Name Format Length Ref# Req Value
Header ST Transaction Set Header 2 R ST
Element Separator AN 1 *
ST01 Transaction set Identifier ID 3/3 143 R 270
Element Separator AN 1 *
ST02 Transaction set Control Number AN 4/9 329 R

See below for more information
And must be identical to SE02

Element Separator AN 1 *
ST03 Implementation Convention Reference AN 1/35   O 005010X279A1
Segment Terminator ~
 

Sample :
ST*270*0001*005010X279A1~

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ST02 – Transaction Set control Number
Just for tracking purpose, Software should generate unique EDI File Batch Number.