Extenders (BNF rule 89)

[John Cowan]

I have been investigating the class of Extenders with a view to a
second part to my XML/Unicoded-3.0 proposal.  I find that three
characters which Unicode classifies as extenders were mysteriously
omitted from the XML category:

	U+0640 ARABIC TATWEEL
	U+0E46 THAI CHARACTER MAIYAMOK
	U+0EC6 LAO KO LA

Can anyone comment on why this was done?  Unless there is a compelling
reason not to,  I would like to bring Unicode and XML in sync here
by adding these as name characters, plus the new character
U+1843 MONGOLIAN LETTER TODO LONG VOWEL SIGN.

-- 
John Cowan                                   cowan at ccil.org
       I am a member of a civilization. --David Brin

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