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

Date: Sat, 09 Mar 2013 16:47:13 +0000

Message-ID: <513B6791.5080009@nag.co.uk>

To: Frédéric WANG <fred.wang@free.fr>

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

Date: Sat, 09 Mar 2013 16:47:13 +0000

Message-ID: <513B6791.5080009@nag.co.uk>

To: Frédéric WANG <fred.wang@free.fr>

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

On 19/12/2012 12:27, Frédéric WANG wrote: > Hi Math WG, > > I notice that in the regular expression for "length" and > "mpadded-length", you use the following definition of numbers: > > [0-9]*(\.[0-9]*)? > > which allows empty string as numbers and whitespace-only "length". > I'm wondering if you could replace this regular expression by: > > [0-9]*(\.[0-9]*|[0-9]) > > That will make the schema a bit stricter and help me for a tool I'm > developing. > Stephen pointed out off list that this would still allow a single "." with no digit and suggested [0-9]*([0-9]\.?|\.[0-9])[0-9]* I have finally got round to updating this so the draft spec at http://www.w3.org/Math/draft-spec/appendixa-d.html#parsing_length and http://www.w3.org/Math/draft-spec/appendixa-d.html#parsing_mpadded-length shows this change. The RelaxNG and XSD schemas are also updated at http://www.w3.org/Math/RelaxNG/ and http://www.w3.org/Math/XMLSchema/ These changes mean that the file <math xmlns="http://www.w3.org/1998/Math/MathML" > <mo lspace=".pt"/> <mo lspace="pt"/> <mpadded width=".pt"><mo>+</mo></mpadded> <mpadded width="pt"><mo>+</mo></mpadded> </math> which was previously reported as valid is now reported as invalid, which matches the prose description of the syntax of these attributes given in the spec. DavidReceived on Saturday, 9 March 2013 16:47:46 UTC

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