From: Daniel Marques <dani@wiris.com>

Date: Tue, 19 Feb 2013 12:42:41 +0100

Message-ID: <9bedead3366e869d54b6b36d58dd141b@mail.gmail.com>

To: David Carlisle <davidc@nag.co.uk>

Cc: www-math@w3.org

Date: Tue, 19 Feb 2013 12:42:41 +0100

Message-ID: <9bedead3366e869d54b6b36d58dd141b@mail.gmail.com>

To: David Carlisle <davidc@nag.co.uk>

Cc: www-math@w3.org

Thanks a lot David! -----Original Message----- From: David Carlisle [mailto:davidc@nag.co.uk] Sent: martes, 19 de febrero de 2013 12:40 To: Daniel Marques Cc: www-math@w3.org Subject: Re: Mirroring Unicode symbols in Arabian On 19/02/2013 11:01, Daniel Marques wrote: > Hi, > > In RTL Arabian math, some symbols like belongs or "subset" are > mirrored but other symbols like arrows are not. I am wondering if > there is some specification somewhere. I'm checking the behavior with > Mozilla and some symbols are mirrored and other not. > > For example, can we conclude that all symbols at ISOAMSA are not > mirrored while the symbols at ISOTECH are mirrored? Or do we have to > decide symbol by symbol? > > Regards, > > Daniel Marques > > www.wiris.com <http://www.wiris.com> Yes there is a mirror property in Unicocde The unicode.xml file used for the mathml entity sets has this information eg for subset <character id="U02282" dec="8834" mode="math" type="relation"> <unicodedata category="Sm" combclass="0" bidi="ON" mirror="Y" mathclass="R"/> note the mirror="Y" There is a link to that from http://www.w3.org/2003/entities/2007doc/#source The ultimate source is the Unicode character database http://www.unicode.org/Public/UNIDATA/ UnicodeData.txt Is the master source for most of the information but there are derived files, in particular http://www.unicode.org/Public/UNIDATA/BidiMirroring.txt has the characters re-ordered by mirroring property rather than codepoint. David (If I got any of this wrong, Murray will no doubt correct me:-)Received on Tuesday, 19 February 2013 11:43:12 UTC

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