W3C home > Mailing lists > Public > www-amaya-dev@w3.org > June 2001

Re: Default name space

From: Vincent Quint <Vincent.Quint@inrialpes.fr>
Date: Sat, 09 Jun 2001 10:10:03 +0200
To: Steve White <wsr4@qwest.net>
Cc: www-amaya-dev@w3.org
Message-Id: <20010609081003.0DD98C990@lihue.inrialpes.fr>
Steve,

I suggest you move this discussion to a more appropriate
forum.  If you want to suggest changes in the name space
specification, send your proposal to xml-dev@xml.org

But I am still curious about your proposal and I am not sure
I understand it. The sample html document at the end of your
message is consistent with the current namespace specification.
How would you write it in the syntax you propose?

Vincent.

Steve White wrote:
>
> I have a complaint about name spaces, as I understand them in
> current implementations of MathML.
> 
> Specifically, I can't find a way to set a default name space.  
> It escapes me why setting the xmlns attribute in the html element
> doesn't define a name space for the whole document.  It seems to
> me that generally, if a name space is defined in a block element,
> that name space should be inherited by all enclosed elements.
> 
> I'm not saying that's the accepted standard, I just would like it
> to be that way.  It would sure cut down on some typing.
> 
> In many demo MathML documents I've seen, each occurrance of math
> defines xmlns="http://www.w3.org/1999/xhtml" in the tag.  This is
> just gross, especially inasmuch is this is likely to change in
> the future.
> 
> There are ways around this that are adequate for display mode. 
> However, in inline mode, having to re-declare the name space for 
> each occurrence of math is a drag.
> 
> So far as I know, there are two choices:
> 
> 1) explicitly declare the name space attribute in the math element:
> 	<math xmlns="&mathml;"><mi>X</mi></math>
> 
> 2) use a name space prefix in each element in the expression
> 	<m:math><m:mi>X</m:mi></m:math>
> 
> Why shouldn't we be allowed to set the name space for the enclosing 
> block element, and simply type
> 	<math><mi>X</mi></math>
> 
> Here are working examples:
> --------------------------------------------------------------------------
> <?xml version="1.0"?>
> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "mathml.dtd"
> [
> <!ENTITY mathml "http://www.w3.org/1998/Math/MathML">
> ]>
> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
> 
> <body xmlns:m='&mathml;'>
> 
> <p>
> Here's a variable in inline mode: <m:math><m:mi>X</m:mi></m:math>.
> </p>
> <p>
> Here's some math in display mode:
> 
> <br />
> <math xmlns="&mathml;" display="block">
> <mi>x</mi><mo>'</mo> <mo>=</mo> <mi>&alpha; x</mi> <mo>+</mo> <mi>&beta; t</mi>
> </math><br />
> <math xmlns="&mathml;">
> <mi>t</mi><mo>'</mo> <mo>=</mo> <mi>&gamma; x</mi> <mo>+</mo> <mi>&delta; t</mi> ,
> </math>
> </p>
> 
> </body>
> </html>
Received on Saturday, 9 June 2001 04:11:00 UTC

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