To use symbols and procedures in more than one module, ALP must recognize shared data as global to all modules. ALP provides directives to simplify data sharing and a high-level interface to multiple-module programming. With these directives, you can define shared symbols and refer to them from other modules.
This section describes the following intermodule linkage directives:
COMM
END
EXTERN/EXTRN
EXTERNDEF
INCLUDELIB
NAME
PUBLIC