Forwarding this because it apparently didn't make it to the list. Begin forwarded message:
> From: David Carlisle <dav...@nag.co.uk> > Date: September 17, 2010 8:44:51 AM PDT > To: webkit-dev@lists.webkit.org > Cc: m...@apple.com > Subject: Re: [webkit-dev] HTML5 & MathML3 entities > > Not sure I can post to this list (hence cc to Maciej) but replying to the > thread from July > > http://www.mail-archive.com/webkit-dev@lists.webkit.org/msg11986.html > > there were a couple of points raised. > > * that rang changed definition > > and > > * entities expanding to more than once character not being supported. > > On the first: > > rang did not used to be (directly) a CJK character it was in the math symbol > block at 2329 but erroneously given a canonical decomposition to the CJK > block at 3008. Unicode recognised the error but never change canonical > decompositions so they deprecated 2320 and introduced a new character 27E8 > that is the same apart from this decomposition. > > http://www.unicode.org/charts/PDF/U2300.pdf > > explicitly says these characters are deprecated: > > > Also, even if Unicode had not deprecated 2329, the W3C "Unicode Normal Form" > bans entities using characters that have canonical decompositions as it makes > entity expansion and NFC canonicalisation interact badly. Changing the > definition is unfortunate but sort of inevitable given the history. > > > On the second: > It's probably worth noting that currently the HTML5 spec only lists entities > that expand to a single character, but there is an open bug entry about that: > > http://www.w3.org/Bugs/Public/show_bug.cgi?id=10067 > > David > > > > > > ________________________________________________________________________ > The Numerical Algorithms Group Ltd is a company registered in England > and Wales with company number 1249803. The registered office is: > Wilkinson House, Jordan Hill Road, Oxford OX2 8DR, United Kingdom. > > This e-mail has been scanned for all viruses by Star. The service is > powered by MessageLabs. > ________________________________________________________________________
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