From: Frédéric WANG <fred.wang@free.fr>

Date: Wed, 02 Jul 2014 17:22:16 +0200

Message-ID: <53B423A8.7050501@free.fr>

To: David Carlisle <davidc@nag.co.uk>, "www-math@w3.org" <www-math@w3.org>

CC: Christian Lerch <christian.p.lerch@gmail.com>

Date: Wed, 02 Jul 2014 17:22:16 +0200

Message-ID: <53B423A8.7050501@free.fr>

To: David Carlisle <davidc@nag.co.uk>, "www-math@w3.org" <www-math@w3.org>

CC: Christian Lerch <christian.p.lerch@gmail.com>

Le 22/06/2014 19:31, David Carlisle a écrit : > > If you don't follow updates to the unicode.xml file used as the source > for entity definitions in mathml and html > skip this message:-) > > Christian's recent questions about unicode.xml (and some recent bug > reports about unicode-math latex package) > prompted me to look again at the tex mappings in unicode.xml. > > The existing ones were mostly speculative assignments dating from the > 1990's some years before the bulk of > math characters were added to Unicode. > > I have extended the schema to allow multiple <latex> and <mathlatex> > elements so the file can track different mappings, > and added a set attribute do distinguish these. So that now for > example there are entries such as > > <mathlatex set="unicode-math">\rightarrow</mathlatex> > > for U+"2192" . > > This mathlatex set="unicode-math" set is mechanically extracted from > the source of the unicode-math package > (the principle method for using unicode math fonts with xelatex and > lualatex) > https://github.com/wspr/unicode-math/blob/master/unicode-math-table.tex > > So, while I'm not sure I like all the mappings here they correspond to > running TeX code which is a definite improvement > over the previous ones. > > Frédéric Wang reported some problems with the TeX mappings a while > back I haven't fixed those yet, I may just remove them > in favour of this new set, or perhaps this set and a set derived from > a package for classic TeX (amssymb or stix-latex) > comments welcome on the best plan of action here.... As I recall, the last time I checked unicode.xml, there were several sets with different mappings (AMS, IIEE etc) and some of them clearly had mistakes, so that was a bit messy. Personally, I don't mind dropping the old TeX mappings as long as a clear list of TeX mapping for math char commands is provided, on which one can rely on. -- Frédéric Wang maths-informatique-jeux.com/blog/fredericReceived on Wednesday, 2 July 2014 15:22:42 UTC

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