You can abbreviate INCLUDE to I.

on z/OS and z/VSE the INCLUDE statement defines the members of the PDS (z/OS) or library (z/VSE), specified with the LIBRARY LIB statement, that ASMXREF includes in the scan. When you specify a member with the INCLUDE statement ASMXREF scans only that member. If the INCLUDE statement is omitted,ASMXREF scans all the members in the specified library except those members excluded with the EXCLUDE statement.

ASMXREF ignores the INCLUDE statement on CMS as ASMXREF scans only source files listed in the source list file.

INCLUDE MOD=FILENAME