Transaction Set Header .
Pos: 010 Max: 1
Heading - Mandatory
Loop: N/A Elements: 2

To indicate the start of a transaction set and to assign a control number Element Summary:

  _Ref_ Id _________Element Name__________ Req Type Min/Max ___Usage___  
  ST01 143 Transaction Set Identifier Code M ID 3/3 Must use  
      Description: Code uniquely identifying a Transaction Set
      All valid standard codes are used.
  ST02 329 Transaction Set Control Number M AN 4/9 Must use  
      Description: Identifying control number that must be unique within the transaction set functional group assigned by the originator for a transaction set

1. The transaction set identifier (ST01) used by the translation routines of the interchange partners to select the appropriate transaction set definition (e.g., 810 selects the Invoice Transaction Set).

Transaction Set