Sample APPC Conversations › Sample Conversations Between Two Systems › Source and Target NCL Procedures

Source and Target NCL Procedures

When two NCL procedures communicate using an APPC connection, the one requesting the connection (via the &APPC ALLOCATE verb) is called the source procedure. As a result of the allocation request, a target procedure is started or attached in the remote system. All the sample conversations involve a source and a target procedure pair.

To allocate a conversation, the source procedure issues an &APPC ALLOCATE verb specifying the appropriate transaction identifier. In the sample conversations, source and target NCL procedure pairs are denoted by $SAAPSxx and $SAAPTxx respectively and the associated transaction identifier by $SATRNxx.