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

LANGLVL

This option specifies the level of the PL/I language definition that you want the compiler to accept. The compiler flags any violations of the specified language definition.

Read syntax diagramSkip visual syntax diagram               .-NOEXT-.
>>-LANGLVL--(--+-OS----+--)------------------------------------><
 
NOEXT
No extensions beyond the language level specified are allowed.
OS
The ENVIRONMENT options unique to the Windows environment are allowed.
Rational Developer for System z
PL/I for Windows, Version 8.0, Programming Guide