3 Flexible ordering and equivalence based on character table
All Application Manual Name SummaryHelp

Availability::- use_module(library(table)).(can be autoloaded)
compare_strings(+Table, +S1, +S2, -Result)
Compare two strings using the named Table. S1 and S2 may be atoms, strings or code-lists. Result is one of the atoms <, = or >.