Initialization Data Set Input Sources

The variable-length statements described above are provided from the following sources:

One source of parameter input is the HASPPARM data sets, specified through a DD statement in the JES2 cataloged procedure. The DDname used is specified in the HASPPARM=ddname initialization option. JES2 only examines columns 1-71 of the input image from this source.
The MVS™ logical PARMLIB concatenation as specified on the PARMLIB statements of the LOADxx member of SYS1.PARMLIB can also be used as a source of parameter input. The logical PARMLIB is used when the PARM='MEMBER=mmmmmmm' initialization option is specified or when the INCLUDE initialization statement is used. JES2 only examines columns 1-71 of the input from this source.
The INCLUDE initialization statement can be used to obtain parameter input from any data set. JES2 examines only columns 1-71 of the input from this source.
When JES2 initialization processing is in console mode, statements (1 to 120 characters in length) can be entered at the console with a HASP WTOR reply. These statements must be syntactically complete (that is, continuation is not permitted on subsequent statements).
Initialization statement processing exit routines (Exit 19) are presented with each variable-length statement and can add new statements. The new statements must also be of variable length as described above. (See z/OS JES2 Installation Exits for further information on exits and their specification.)

Initialization statements can be specified by the input source in any order. Parameters can also be specified in any order. When a statement or parameter is specified, that value is used until that statement or parameter is specified again. That is, if the same parameter occurs more than once or if the same parameter occurs more than once for a statement, JES2 will use the value of the last one it reads.