In that era, double ampersand was invalid. When IBM added symbolic parameters, they added double ampersand as an escape for a single ampersand. I don't know whether they were thinking about temporary DSNs when they came up with the rule.
________________________________________ From: IBM Mainframe Discussion List <[email protected]> on behalf of Paul Gilmartin <[email protected]> Sent: Wednesday, July 5, 2023 9:59 PM To: [email protected] Subject: Re: Double ampersand? On Wed, 5 Jul 2023 22:06:39 +0000, Seymour J Metz wrote: >The use of a single ampersand is older than symbolic parameters; see, e.g., ><http://secure-web.cisco.com/1qBo8uzgS4l-ZyFBSF7NrjJ8Snm54Zdmhco90iydydoOif2IFkArM3ROtMFsEViFS0XFr5N54fKzd-Y7E4kJL9Zx2dzbmlS45UyfYdEMGvEQQjBEtoopVsM4yDdYmnOi-Yli1NLGFsBDey5MUemHf2K7Tnd-_U_9s_7tQSPdbAE0tWuVn_pjCJaSLjOr4TQ7lKw9M0uGBzynK2NphSoUe_9qMcLHScULfGBmEVgrUKw2W4ZGNdhGuzUxvAifDdADFNejjMfnutIKzmi-PIagXRlyXXfQpu_W8m46r0NUqkurR_n0k-2xSwg8kXGi0JgG5M6jZp8yUo0vLsIF70QB4lvWH8Y1q3kCKPQyltnkOC3rzy7yQpAWM7a1R0oAKrmmGnruBcLcNOmObywCZGro_AXnjoZybMKCHpmSFIv0FQc4/http%3A%2F%2Fbitsavers.org%2Fpdf%2Fibm%2F360%2Fos%2FR01-08%2FC28-6539-4_OS_JCL_Mar67.pdf%23page%3D23> > In that era, did '&&TEMP' represent a temporary data set, or was it a later accommodation to avoid errors resulting from unintended substitution? Kolusu's citation quotes Ed J. as: IBM does not mention the single ampersand being valid temporary data set name syntax ... They do now, according to Kolusu's more recent citation. Still, I believe IBM is making it needlessly complex. I believe: If the result of symbol substitution is a single ampersand followed by a single qualifier it represents a temporary data set name. Can anyone supply a refutation of this simple rule? >________________________________________ >From: Sri h Kolusu >Sent: Wednesday, July 5, 2023 5:53 PM > >>> Are they making a special case out of something that isn't a special case? > >Gil, > >Not really > >https://www.mail-archive.com/[email protected]/msg80064.html -- gil ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
