Did the reason for the 7 char TSO HLQ come from the UADS process needing the last char in the member name to chain the information for a given TSO ID in SYS1.UADS (think ACCOUNT Function)?
Lizette > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:[email protected]] On > Behalf Of Mike Schwab > Sent: Thursday, September 15, 2016 10:19 AM > To: [email protected] > Subject: Re: TSO User ID Rules (Was: z/OS and code pages) > > The TSO ID is used as a HLQ for data set names. Therefore it must meet the > rules for MVS Dataset names: first character A-Z@#$, second to seventh > character A-Z@#$0-9, max 7 due to PDS member needing 8th character. Minimum > length determined by site. > > On Thu, Sep 15, 2016 at 11:19 AM, Tony Harminc <[email protected]> wrote: > > On 15 September 2016 at 02:41, Timothy Sipples <[email protected]> wrote: > >> Tony Harminc wrote: > >>>What, in this context, is an MVS subsystem? ...And where is this text > >>>from -- evidently not the RACF Security Administrator's Guide? > >> > >> You are allowed to take a look at the Administrator's Guide. :) > > > > I already had, and the phrase "MVS subsystem" does not appear in that book. > > > >> But here's a copy/paste: > >> > >> "TSO and MVS also require that the first character of user IDs be > >> uppercase A - Z, # (X'7B'), $ (X'5B'), or @ (X'7C')." > > > > That says nothing about "subsystem". You appear to have inserted the > > word, and I'm just trying to understand why and with what meaning. > > > >> So what does "MVS" mean in this context? The Administrator's Guide > >> doesn't say. "Not z/OS UNIX System Services" is a reasonable answer, > >> but it might be a partial one. > > > > I obviously wasn't clear: It's the "subsystem" part I'm asking about, > > not the "MVS" part. I know at least a couple of meanings of the word > > "subsystem" in MVS. But I don't know of any such usage that sets these > > additional requirements for userids. Unless you are using it with some > > trivial meaning like "stuff that runs on MVS that isn't UNIX or TSO > > and somehow, you know, does stuff with userids". > > > > Tony H. > > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
