The CICS®-supplied paging transaction, CSPG, allows a user at a terminal to display individual pages of a logical message by entering page retrieval requests. Your systems staff define the transaction identifiers for retrieval and other requests supported by CSPG in the system initialization table; sometimes program function keys are used to minimize operator effort.
Retrieval can be sequential (next page or previous page) or random (a particular page, first page, last page). In addition to page retrieval, CSPG supports the following requests:
The process of examining pages continues until the operator signals that the message can be purged. CSPG provides a specific request for this purpose, as noted above. If the SEND PAGE command contained the option OPERPURGE, this request is the only way to delete the message and get control back from CSPG.
If OPERPURGE is not present, however, any input from the terminal that is not a CSPG request is interpreted as a request to delete the message and end CSPG. If the message was displayed with the RETAIN option, the non-CSPG input that terminates the display can be accessed with a BMS or terminal control RECEIVE when the task resumes execution. See the CICS Supplied Transactions manual for detailed information about the CSPG transaction.
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