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

ILIB objects

ILIB objects are used to manipulate modules in a library. When you run ILIB, you can specify multiple objects in any order.

Each object consists of the ILIB command, followed by the name of the object module that is the subject of the command. Separate objects on the command line with a space or tab character.

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