Ref: Your note of Mon, 11 Dec 2017 07:25:43 -0800 > In VM-land, they're canon, because of use of CMS UPDATE for maintenance. > z/OS is poorer for lack of an equivalent: I know there's IEBUPDTE, but with > no good way to create updates, it doesn't seem to be used much. XEDIT in > UPDATE mode makes source maintenance SO much easier! A shame that > functionality never got added to ISPF. > > ...phsiii
The SUPERC utility (ISRSUPC from ISPF, or ASMFSUPC from the HLASM Toolkit) has an UPDMVS8 option which compares two levels of a file and produces an IEBUPDTE-type update file. It also has a similar UPDCMS8 option to produce a CMS UPDATE file. That method is in many ways safer and more flexible than using the editor to create update files, as it is not confused by lines which have been touched without actually having been changed, and it does not even need the new version of the file to have sequence numbers. So for example, one can update a source file on a workstation, upload it to VM and create a "delta" for the corresponding support copy maintained using sequence numbers in IBM's SPA repository. Jonathan Scott HLASM, IBM Hursley, UK
