W3C home > Mailing lists > Public > www-math@w3.org > April 2010

Re: New attributes for MathML 3.0

From: David Carlisle <davidc@nag.co.uk>
Date: Thu, 08 Apr 2010 16:42:01 +0100
Message-ID: <4BBDF949.7080604@nag.co.uk>
To: Ionel Alexandru <ionel.alexandru@gmail.com>
Cc: www-math@w3.org
On 07/04/2010 17:35, Ionel Alexandru wrote:
> Hi,
> I have an implementation of MathML 2.0 to display mathematical
> information on web www.fmath.info <http://www.fmath.info/>.
> And I suggest some modifications for MathML 3.0:
> 1. Why Radicals |<msqrt>|, |<mroot> |don't have *linethickness*
> attribute like *mfrac* ?

I suspect that the reason that historically this has not been done is 
that for systems where all or part of the radical come from font glyphs
rather than being drawn specifying the width is not very natural (it 
would be like specifying the with of the upright in a T. The fact that 
the line thikness is logically tied to the glyph used for the square 
root sign in the font also suggests a way of controlling the thickness, 
as you would in TeX by changing the font size (and if necessary changing 
it back inside the radical). For systems that draw the radical with 
linedrawing primitives, specifying a line thickness would be more 
natural, but (I think) the font view explains the current facilities.

>    I think must be inserted. In my implementation I have added:
> http://www..fmath.info/formula/ex/msqrt.jsp#main
> <http://www.fmath.info/formula/ex/msqrt.jsp#main>
> 2. Add to *Mathematics style attributes common to presentation elements:*
>

Please if you implement additional  attributes, place them in a 
namespace. MathMl2 and 3 both allow any attributes in your own namespace 
as a valid extension mechanism. If however you implement private 
extension attributes that are not prefixed, and documents written to use 
those extensions will be invalid MathML and could be  rejected by other 
systems.

>     * attribute *border -* to have a border around a box Ex: <mrow
>       border='1'>
>
> http://www.fmath.info/formula/ex/mi.jsp#main

This functionality is I think provided by menclose, and while a new 
attribute is a litle bit more compact, menclose is more versatile (it 
can specify borders on just some of the sides for example) and in 
general we try to avoid adding things that are just syntactic variants 
of existing features.

 > I am new to participate to a specification and I don't know what are the
 > next steps to have in the new spec my ideas.
 > Thank you and I hope I could help



welcome aboard, it's always good to see new implementations. even though 
you have targeted mathMl2 so far, it would be interesting to use the 
testsuite runner at

http://devdemo.activemath.org/testsuite/main/

and include your results in

http://www.w3.org/Math/testsuite/results/tests.html

It's simple to skip the areas that you have not implemented (ie you can 
report them as not tested rather than failed) see the grey areas in some 
of the currently submitted reports.


David



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. 
________________________________________________________________________
Received on Thursday, 8 April 2010 15:52:30 GMT

This archive was generated by hypermail 2.2.0+W3C-0.50 : Thursday, 8 April 2010 15:52:31 GMT