UNI EN 29735 : 1991

Foreword
Introduction
1. Scope
2. Normative references
3. Definitions
4. Syntax levels
5. Character sets
5.1 Level A character set
5.2 Level B character set
6. Structures
6.1 Interchange structure
6.2 Order of segments and groups of segments within
      a message
6.3 Segment structure
6.4 Data element structure
7. Compressing
7.1 Exclusion of segments
7.2 Exclusion of data elements by omission
7.3 Exclusion of data elements by truncation
7.4 Exclusion of component data elements by omission
7.5 Exclusion of component data elements by truncation
8. Repetition
8.1 Repetition of segments
8.1.1 Explicit indication of repetition
8.1.2 Implicit indication of repetition
8.2 Repetition of data elements
9. Nesting of segments
9.1 Explicit indication of nesting
9.2 Implicit nesting indication
10. Representation of numeric data element values
10.1 Decimal sign
10.2 Triad separator
10.3 Sign
Annexes
A. Definitions
B. Service segments specifications
C. Order of segments and groups of segments within
      a message

Gives syntax rules for the preparation of messages to be interchanged be between partners in commerce, transport, and administration. Specifies the A and B syntax levels, which are identical apart from the character sets used. Deals with character sets, structures, compressing, repetition, nesting of segments, and representation of numeric data element values.