Collation is another area of localization where Ethiopic will likely need several specifications for older and newer traditions. Boundaries of applicability should be clearly specified. Distinctions be clearly made between localization to Ethiopic script vs localization to an Ethiopian language. At the very least character classes must be defined. Whether or not new operators are required remains for an in depth study.
Character classes are subsets of the Unicode set.
Character classes are defined with respect to a specific language or group of languages. The introduction of new operators must show that regular expressions languages are incapable of performing the desired operation -not just inconvenient. Typeface describes a distinctive design applied to a set of visually related symbols. For Ethiopic fonts a single typeface may have a dozen or more names. Names of vendors are excluded unless the vendor is also the original artist of the typeface.