What is the significance of logical_order_exception being true for a character?
TUS 9.0 Section 4.3 appears to claim that such characters need to be rearranged 'logically' for searching and sorting. However, I cannot see how they need to be rearranged for searching. Is this property a general warning, or does it mean that swapping with the *next* character gives a less bad sorting experience? For example, why doesn't U+17CC KHMER SIGN ROBAT have the property? Consonant + ROBAT has to be rearranged to ROBAT + consonant for sorting - ROBAT is a repha stored after rather than before the *visual* base consonant. Richard.
