The application programming interface (API)

This section summarizes the changes affecting the CICS® application programming interface (API).

Program compatibility

Except for the specific cases described in this section, CICS TS provides compatibility with future releases, at source and object level, for all CICS application programs that are written to the CICS application programming interface, and which execute correctly under the previous release.

For information about CICS support for application programming languages, see the CICS Transaction Server for z/OS® Release Guide.

Although CICS provides API compatibility from release to release, functional changes to some CICS components can affect some of the CICS API commands. The effects of these functional changes are discussed in the following topics:

Note:
In addition to the changes affecting the API, there are extensions to some EXEC CICS commands, and these are described in the the CICS Transaction Server for z/OS Release Guide.
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