What does RCPL mean in Computing?

Routing Control Parameter List

A routing control parameter list (RCPL) is associated with each z/TPF input or output message. The RCPL provides information about the origin, destination, and characteristics of the message. z/TPF programs use this information to determine the routing required for the message. Application programs, for input messages, use the RCPL to determine the message characteristics and its origin. The application's input message editor must look at the RCPL to determine if the input is a normal new message, a resubmitted input message resulting from failure of a reply to the original, or a returned output message resulting from a failure to transmit successfully to its destination. For output messages, the application program generates the RCPL to provide the z/TPF programs with the information necessary to route the message to its destination. The RCPL is passed to the application starting at ebw000 of the ECB work area. The length of the RCPL is either the 12-byte basic format or 16-byte extended format. The extended format provides for an additional optional general data area of up to 82 bytes. The application must specify at implementation time which format will be used. This is done with the RCPL parameter of the MSGRTA macro in SIP. (See z/TPF and z/TPFDF System Generation.)

Computing