Parameters

dd-name: Specifies the ddname that is being queried. The value can be ISPPLIB, ISPMLIB, ISPSLIB, ISPTLIB, ISPLLIB, ISPTABL, ISPFILE, or any valid base DDNAME.
id-var: Optional parameter that specifies the name of a dialog variable which is to contain "ID" information. It is set to the data set name or names of the ddname that was specified in the service call. All data set names returned are fully qualified. Multiple data set names are separated by a comma. TSO has a maximum of 255 data set names allowed in the data set list. A data set name list is bounded by parenthesis when the QBASELIB service is requested through ISPLINK. The variable is not modified if the ddname specified is not allocated. It is the responsibility of the dialog developer to initialize this variable.
Note: Id-var should be initialized to blanks before every QBASELIB call.
buf-len: Specifies a fullword fixed binary integer containing the length of "buffer".
buffer: Specifies a buffer containing the name of the service and its parameters in the same form as they would appear in an ISPEXEC call for a command procedure.