Rational Developer for System z
PL/I for Windows, Version 8.0, Programming Guide

Essential information for creating and accessing regional data sets

To create a regional data set, you must give PL/I certain information, either in the ENVIRONMENT attribute or in the DD:ddname environment variable.

You must supply the following information when creating a regional data set:

Rational Developer for System z
PL/I for Windows, Version 8.0, Programming Guide