This file is indexed.

/usr/share/m17n/IBM903.map is in m17n-db 1.6.5-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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# Generated from /usr/share/i18n/charmaps/IBM903.gz
0x0000-0x007F 0x0000