W3C home > Mailing lists > Public > www-math@w3.org > February 2012

Re: Namespace prefix or not?

From: Bruce Miller <bruce.miller@nist.gov>
Date: Sun, 05 Feb 2012 02:04:29 -0500
Message-id: <4F2E29FD.5080004@nist.gov>
To: Neil Soiffer <NeilS@dessci.com>
Cc: "www-math@w3.org" <www-math@w3.org>
On 02/04/2012 07:14 PM, Neil Soiffer wrote:
> The "universal" solution for XHTML and HTML5 is to put the namespace decl on the
> math tag as in
>
> <math xmlns='http://www.w3.org/1998/Math/MathML'>
> <mi>x</mi><mo>+</mo><mi>y</mi>
> </math>
>
> This should work for all HTML5 parsers and for all XHTML parsers.  MathPlayer
> will handle this form in IE when it is served as XHTML via a MIME filter it
> installs that rewrites the math in the page.  This form is not legal for HTML4,
> but MathML isn't really part of HTML4 and only works in HTML4 for IE+MathPlayer.

Ah, great!
Indeed MathPlayer seems to be accepting it both ways
(maybe it always did, and my memory's going),
as does firefox, so the prefix-less way looks like the
best solution...

Thanks, Neil!

Bruce

>      Neil
>
>
>
> On Sat, Feb 4, 2012 at 12:54 PM, Bruce Miller <bruce.miller@nist.gov
> <mailto:bruce.miller@nist.gov>> wrote:
>
>     Seems odd asking such a fundamentally naive
>     question so late in the game, but...
>
>     As we all know, you can include MathML in XHTML
>     either by declaring and using a namespace
>     prefix, m: by tradition, or by placing
>     an xmlns namespace declaration on _each_
>     math element.
>
>     I have always preferred the prefixed form
>     --- seems more readable, perhaps more compact
>     in practice (though I never tested).
>     I have the vague recollection that early versions of
>     MathPlayer _required_ the prefixed form for IE to trigger it(?)
>
>     But now I find that
>     http://www.dessci.com/en/__products/mathplayer/author/__creatingpages.htm
>     <http://www.dessci.com/en/products/mathplayer/author/creatingpages.htm>
>     prefers the NON-prefixed form for xhtml.
>     Moreover, the <mumble mumble> validator at w3,
>     http://validator.w3.org/, has nice analysis,
>     but is dtd-based and only recognizes the NON-prefixed
>     form. I've never found such a convenient online
>     service doing relaxng validations (so do it at home).
>
>     So, maybe I mis-remembered MathPlayer's requirements,
>     or am forgetting some other reason...
>     Are there any remaining reasons (besides taste) to prefer
>     the prefixed form?
>
>     bruce
>
>     PS: No need to mention that html5 doesn't want the prefix;
>     in fact: PLEASE DONT! :>
>
>
Received on Sunday, 5 February 2012 07:04:58 GMT

This archive was generated by hypermail 2.2.0+W3C-0.50 : Sunday, 5 February 2012 07:05:00 GMT