Defining the VTAM USERVAR table

These examples show the relationship between the IMS system definition parameters and the VTAM® interpret USERVAR table parameters used with Extended Recovery Facility (XRF).

Related reading:

For more information on the USERVAR table, see VTAM operations in an XRF complex with USERVAR.
For more information on IMS system definition parameters, see IMS Version 15 System Definition.

You should perform the following tasks:

You must specify the APPLIDs and passwords of both systems in the APPLID and PASSWORD parameters of the COMM macro at IMS Generation. For example:
```
IMSCTRL HSB=YES COMM APPLID=(IMS1,IMS2),PASSWORD=(IMSP1,IMSP2)
```
Before starting the IMS system, you must set up the DFSHSBxx member of the IMS-PROCLIB specifying the Generic Application ID in the USERVAR parameter. For example:
```
USERVAR=IMS
```
The Generic Application ID must be registered into the VTAM interpret table as a user variable. For example:
```
LOGCHAR APPLID=(USERVAR,IMS),SEQUENCE='IMS'
```
APPLIDs specified in APPLID parameter of the COMM macro must be defined as either SPO (secondary programmed operator) or PPO (primary programmed operator) in the VTAM definition library. For example:
```
      VBUILD TYPE=APPL IMS1  APPL   AUTH=(ACQ,SPO),PRTCT=IMSP1,HAVAIL=YES
IMS2  APPL   AUTH=(ACQ,SPO),PRTCT=IMSP2,HAVAIL=YES
```