Extenders (BNF rule 89)

John Cowan cowan at locke.ccil.org
Tue Sep 14 18:50:09 BST 1999

Blunderingly I wrote:

> 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:

Please ignore this whole posting: it was the result of a bug in my
investigative scripts.

The upshot is that I have now looked at the Unicode 3.0 property
lists, and they don't add anything new.  My previous proposal stands.
However, the rationale for the fifth rule in Appendix B has now
gone away, and these characters should be treated as backward-compatibility
exceptions: they are of type Lm but are considered name-start characters.

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

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