GRIDT01.LIB.RUNJCL(GTXGEN) provides a sample job, that references inputs as delivered in the installation.
The DEFSRC and DEFTGT datasets, in general, are generated from PL/I or COBOL copybooks as described in the
documenatation.
The sample job uses these inputs:
DEFSRC='GRIDTOOL.LIB.DEFCSV(TEST)',
DEFTGT='GRIDTOOL.LIB.DEFCSV(TEST1)'