I guess, like usual, I did not give enough details in my original post.  But 
you are correct, Gil, I was wanting this feature in "JCL only".  So anything 
programmatic would not work (at least not with a lot more effort and changes 
than I am wanting).  Thanks for all ideas.  This would have been more of a nice 
to have than anything.
________________________________
From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> on behalf of 
Paul Gilmartin <0000000433f07816-dmarc-requ...@listserv.ua.edu>
Sent: Friday, April 6, 2018 2:20 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: Finding a member in a DD concatenation

On Fri, 6 Apr 2018 14:45:47 -0500, John McKown wrote:
>
>What would be nice would be if IBM were to build a callable service around
>this function and put it in as part of LE so that it could be used by any
>of IBM's HLLs.
>
In assembler, the FIND macro does much of this.

In ISPF services, LMMFIND does much of this.

And you mentioned IEBCOPY.  What are IEBCOPY's restrictions on concatenations?

It would be nice if there were a general service for this.  Some programmers
would prefer that it not require LE.

The OP wanted the function in JCL.  This would require new syntax.

UNIX has a similar lack.  Many utilities rely on a colon-separated list of
directory paths (PATH, MANPATH, XFILESEARCHPATH, CLASSPATH, ...),
but I believe there's no uniform service to open a member from such a string.

-- gil

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