The SAA solution is based on a set of software interfaces, conventions, and protocols that provide a framework for designing and developing applications.
The purpose of SAA REXX is to define a common subset of the language that can be used on several environments. TSO/E REXX is the implementation of SAA REXX on the MVS system. If you plan on running your REXX programs on other environments, however, some restrictions may apply and you should review the publication SAA Common Programming Interface REXX Level 2 Reference.
The SAA solution:
Several combinations of IBM hardware and software have been selected as SAAenvironments. These are environments in which IBM manages the availability of support for applicable SAA elements, and the conformance of those elements to SAA specifications. The SAA environments are the following:
Common Programming Interface
The Common Programming Interface (CPI) provides languages and services thatprogrammers can use to develop applications that take advantage of SAA consistency. The components of the interface currently fall into two general categories:
The CPI is not in itself a product or a piece of code. But—as a definition—it does establish and control how IBM products are being implemented, and it establishes a common base across the applicable SAA environments.
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Rexx General Concepts
Numbers And Arithmetic
Conditions And Condition Traps
Using Rexx In Different Address Spaces
Reserved Keywords, Special Variables, And Command Names
Tso/e Rexx Commands
Tso/e Rexx Customizing Services
Language Processor Environments
Initialization And Termination Routines
Replaceable Routines And Exits
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