Server Guide

Creating the I/O area

A program uses an I/O area to pass segments back and forth between itself and IMS. What the I/O area contains depends on the kind of call you are issuing:

In Smalltalk, you can define the I/O area as a collection of ByteArrays or OSObjects with a reftype value of structure. To break the structure of the I/O area into usable Smalltalk classes, use either a COBOL or C parser. For information on COBOL or C parsers, refer to the VisualAge User's Guide.

See IMS Application Programming: DL/I Calls for more information about the I/O area.


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