On z/OS DB2 (V9), the CREATOR prefix of objects is SYSIBM instead of SYSCAT. Each system resource is further prefixed by the word SYS. I.e. the resources are: SYSIBM.SYSDATATYPES, SYSIBM.SYSINDEXES, SYSIBM.SYSSEQUENCES, SYSIBM.SYSTABLES, SYSIBM.SYSTABLESPACE (n.b.: not "SYSIBM.SYSTABLESPACES"), SYSIBM.SYSTRIGGERS, SYSIBM.SYSVIEWS. I didn't find an entry corresponding to SYSCAT.PROCEDURES.
I have attached the column names and types in the beforementioned tables. I'll try to check the details. The column names seem to vary at least. E.g. for views they are PATHSCHEMAS and NAME.