On Sun, 2011-12-25 at 23:17 -0500, Robert A. Rosenberg wrote: > At 19:20 -0600 on 12/24/2011, Paul Gilmartin wrote about Re: > Eight-character TSO Userid Support: > > >Hmmm. How many upper-case alphanumeric characters would be needed > >to provide unique identifiers for all the files an enterprise would ever > >need? > >By that metric, 44(8) is more than sufficient. > > A dataset name is up to 44 characters long but that is based on a set > of 36 characters (26 letters and 10 numbers) CURRENTLY broken up > into 1-8 character blocks separated by periods. The 8 character > blocks are composed, if I remember correctly of 1 Alpha (A-Z) > followed by 0-7 Alpha (A-Z) and Numeric (0-9) characters. There may > also be some special characters in addition to the 36 (I forget).
Each "node" is 1 to 8 characters. First character is alphabetic or a national character, of which there are three: @#$ in U.S. The other seven characters may be any of those plus the digits 0 through 9 and a dash (-). The dash threw me, when I first saw it. I don't know when that became legal in a DSN. > > For GDG Datasets, the limit is 39(8) since the last 9 are required > for the ".GxxxxVyy" suffix to the GDG File Base Name. What do you > mean by 44(8) anyway? > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@bama.ua.edu with the message: INFO IBM-MAIN -- John McKown Maranatha! <>< ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: INFO IBM-MAIN
