Cuneiform is a writing system that is used for several ancient languages. Several of these language have specialized braille codes. Braille codes also exists for Cuneiform that is transliterated or normalized using Latin characters.
Liblouis has two tables for handling transliterated Cuneiform. For the variant with compact diacritics, refer to the unofficial document by Eric J. Harvey Braille Spec for Cuneiform Transliteration, Compact
The code is also documented at https://www.duxburysystems.com/documentation/dbt12.5/languages/semitic_tbl.htm.