I don't believe that the GRT can be sufficiently generalized in any practical sense to cover all problems
Given a function to convert floats to lexicographically ordered strings, you should be able do a GRT on any series of || linked cmp and <=> operator operators. Are there any antisymmetric, transitive, total relations that can't be written as a series of || linked cmp and <=> operators?

In reply to Re^3: Advanced Sorting - GRT - Guttman Rosler Transform by I0
in thread Advanced Sorting - GRT - Guttman Rosler Transform by demerphq

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