IBM SC34-5764-01 User Manual
Page 359
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5. REXX commands can be written in REXX. These REXX commands in turn call other REXX commands
which are written in REXX, in a building block fashion. Since DEFSCMD hides the implementation
detail from the REXX user (programmer), a command can be quickly written in REXX and later
transparently rewritten in another language, if it becomes performance critical.
Commands
Chapter 25. REXX/CICS Commands
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