Re: <math><mfrac><numerator> which need namespace prefix?

David Carlisle <[email protected]> Mon, 14 May 2007 22:14:26 +0100

Newsgroups	gmane.comp.mozilla.devel.mathml
Message-ID	<[email protected]>


MathML doesn't have elements <numerator and <denominator so both your
examples are in error, and it would be unspecified what the browser
should do in those cases. Also all the elements need to be in the MathML
namespace. 

Valid forms are

<mathml:math xmlns:mathml="http://www.w3.org/1998/Math/MathML">
<mathml:mfrac>
<mathml:mn>3</mathml:mn>
<mathml:mn>4</mathml:mn>
</mathml:mfrac>
</mathml:math>

<math xmlns="http://www.w3.org/1998/Math/MathML">
<mfrac>
<mn>3</mn>
<mn>4</mn>
</mfrac>
</math>


The main advantage of the prefixed form in an xhtml+mathml context is
that you only need declare the namespace once, say on the <html> element
and it's in scope for the whole document. But depending on the number of
elements per expression, and the length  of the prefix, the file size
may in fact be smaller by using teh unprefixed form and repeating the
namespace decln.

David

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