---
id: BIG
name: Beginning Segment for Invoice
purpose: To indicate the beginning of an invoice transaction set and transmit identifying numbers and dates.
elements:
  - { ref: BIG01, id: '373', req: M }
  - { ref: BIG02, id: '76',  req: M }
  - { ref: BIG03, id: '373', req: O }
  - { ref: BIG04, id: '324', req: O }
  - { ref: BIG05, id: '328', req: O }