It is definitely "mainframe only" (i.e. DB2 for z/OS; it isn't clear for
which release).
And (imho) it doesn't offer much added value over the catalog info in the
official documentation.
Check out this site from Quest Software:
http://www.toadworld.com/Downloads/ExclusiveToadWorldSoftware/tabid/78/Default.aspx
which offers (free) downloads for DB2 System Catalog reference tool for:
- DB2 LUW 8.2
- DB2 LUW 9.1
- DB2 z/OS v8
(and, for those also working with Oracle, a Data Dictionary tool and a
number of PL/SQL related tools)
HTH
--
Jeroen