Implications of Logical Order Exception Property

From: Richard Wordingham <>
Date: Wed, 25 Jan 2017 08:13:10 +0000

What is the significance of logical_order_exception being true for a

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.

Received on Wed Jan 25 2017 - 02:13:56 CST

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