Ok another short one: just a small JCL script with working example for the definition of a user catalog. This would accompany the example of the alias definition for a user catalog that can be found here.

//DEFCAT   EXEC PGM=IDCAMS                               
//SYSPRINT DD SYSOUT=*                                  
//SYSIN    DD *                                       
DEFINE UCAT (NAME(SYS1.USERCAT.PROD) VOLUME(DASD1B) - 
        CYL(6,1) ICFCAT  )          

Enjoy.

Pierre G.