On Sun, 19 Oct 2008 10:50:37 -0400, Phil Smith III wrote:
>Paul Gilmartin wrote, re running Rexx programs on Windows without a leading
>indicator of the language:
>>How does the system recognize that it's Rexx and not some other language?
>
>Excellent question. Because (a) it has a file extension associated with
>rexx.exe, or (b) because you said "rexx <fn>".
>
(a) relies on a distinguished part of the namespace, and as
such is akin to invoking an EXEC from the distinguished
DDNAME SYSEXEC.
(b) relies on a distinctive calling sequence, and as such is
akin to invoking an EXEC via the Rexx API.
Neither of these requires a leading language indicator in z/OS.
In situations where the context does not so indicate the language,
(as from SYSPROC in TSO/E, or from PATH in z/OS Unix), a leading
indicator of the language is generally required.
-- gil
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