Shift tables
You can use shift tables to specify lowercase and uppercase characters that belong together.
The file with the shift table has this default name:
$BSE/lib/nlsinf/shift.tab
To make your own shift table, you can fill the SH_TABLE environment variable with the name of the file with your own shift table. A shift table has two columns. The first column contains the uppercase character, and the second column contains the lowercase character.
For example, to specify the lowercase and uppercase character C with cedilla, create a shift table with this contents:
\199 \231