ANSI X12.1 : 1997

1 Purpose and scope
2 Referenced and related American National Standards
3 Terms and definitions
4 Transaction set specifications
4.1 Introduction
4.2 Heading area
4.3 Detail area
4.4 Summary area
Tables
1 Data segment sequence for the heading area
2 Data segment sequence for the detail area
3 Data segment sequence for the summary area
Appendix - Example of a purchase order transaction
Figures
A1 Original purchase order
A2 Translation of purchase order for electronic
     business data interchange

Describes data contents and format required for a purchase order transaction set