Link3270 message formats
This topic contains Product sensitive Programming Interface and Associated Guidance Information.
Link3270 message components
Link3270 messages
contain the following components:
Copybook names and descriptions
To help simplify the programming of clients, CICS® provides copybooks and header files defining the BRIH and BRIV data structures in Assembler, COBOL, PLI and C. Defaults are provided for each inbound vector. These vectors are used to initialize the input message. There are two versions of the copybooks. When the basic copybooks are used, the current version is set to indicate basic support. The extended copybooks provide extended support, and when they are used the current version is set to indicate extended support.
The copybook names for the basic copybooks are:
- DFHBRIHx
- BRIH and inbound and outbound BRIVs for C, PLI, and Assembler
- DFHBRIIx
- Inbound BRIVs for COBOL
- DFHBRIOx
- Outbound BRIVs for COBOL
- DFHBRICx
- Constants and default values
- DFHBR2Hx
- BRIH and inbound and outbound BRIVs for C, PLI, and Assembler
- DFHBR2Ix
- Inbound BRIVs for COBOL
- DFHBR2Ox
- Outbound BRIVs for COBOL
- DFHBR2Cx
- Constants and default values
- D
- Assembler
- H
- C
- L
- PLI
- O
- COBOL
- Field names
- Field names are shown in this documentation with "-" (dash) separators, as used in earlier versions of COBOL supported by CICS. Other languages use _ (underscore) separators.
- Constants
- Constants are provided for all enumerated values (input and output). For COBOL, these are provided as level 88 in the copybook.