IBM Mainframe Forum

Posted: **Mon Apr 15, 2013 11:18 am**

Dear friends
I my JCL there is following statement:

//ACBGEN EXEC PROC=ACBGEN,SOUT='*',COMP='POSTCOMP'
//G.IMS DD DSN=IMSV7.BNK.PSBLIB,DISP=SHR
// DD DSN=IMSV7.BNK.DBDLIB,DISP=SHR
//G.IMSACB DD DSN=IMSV7.BNK.ACBLIB,DISP=SHR
//G.SYSIN DD *
BUILD PSB=MYPSB001

What is the meaning of G(dot)SYSIN . Is it special meaning for period (or dot character) on DDNAME. (Same question for G.IMS and G.IMSACB)

Posted: **Mon Apr 15, 2013 11:33 am**

If you look in the PROC ACBGEN you'll from a "step" called G. The "G." is a method to override/add DD names in step G of the PROC.

Posted: **Mon Apr 15, 2013 1:13 pm**

The dot is a seperator just as in the dataset name. In the datasetname it seperates the different levels (qualifiers) and in a DDNAME override it sepearatesthe stepname being over-ridden from the ddname. All is explained in either/both of the JCL language reference manual and JCL users guide.

Posted: **Mon Apr 15, 2013 7:25 pm**

The format is stepname.ddname for an override. So look for the 'G' step in your proc.

You can also ADD dds to a step this way. Also, make sure the overrides are in the same order as the proc ddnames. New ones go last.

IBM Mainframe Forum

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Re: What is the meaning of "dot" in DDNAME.

Re: What is the meaning of "dot" in DDNAME.