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

Date: Sun, 22 Jun 2014 18:31:06 +0100

Message-ID: <53A712DA.8090305@nag.co.uk>

To: "www-math@w3.org" <www-math@w3.org>

CC: Christian Lerch <christian.p.lerch@gmail.com>, Frédéric Wang <fred.wang@free.fr>

Date: Sun, 22 Jun 2014 18:31:06 +0100

Message-ID: <53A712DA.8090305@nag.co.uk>

To: "www-math@w3.org" <www-math@w3.org>

CC: Christian Lerch <christian.p.lerch@gmail.com>, Frédéric Wang <fred.wang@free.fr>

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.... While I was extending the schema anyway I added an attribute to the top level element that records which version of Unicode the data is supposed to match. (currently 6.3) David http://www.w3.org/2003/entities/2007xml/Received on Sunday, 22 June 2014 17:31:40 UTC

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