APPC Transaction Programs

An APPC transaction program is not an application; it is a section of an application. A single application can contain many transaction programs. Every transaction program has a unique 8-byte identification number (tp_id).

APPC supplies verbs that start and stop transaction programs within applications. APPC also supplies a full set of conversation verbs that you can use to implement the function of your transaction program.

A transaction program issues a request to APPC, in the form of a verb, to perform some action for an application program. A verb is a formatted request that a transaction program issues and APPC executes. A program uses APPC verb sequences to communicate with another program. Two programs that communicate with each other can be located at different systems or on the same system.

When a transaction program exchanges data with another transaction program, they are called partner transaction programs.