Basic mapping support (BMS)

The mapping operations of BMS are performed in the system on which the user's transaction is running; that is, in the application-owning region (AOR). The mapped information is routed between the terminal and this transaction through the relay transaction, as for terminal control operations.

For BMS page building and routing requests, the pages are built and stored in the AOR. When the logical message is complete, the pages are shipped to the terminal-owning region (or regions, if they were generated by a routing request), and deleted from the AOR. Page retrieval requests are processed by a BMS program running in the system to which the terminal is connected.