- From: Simon Pieters <simonp@opera.com>
- Date: Wed, 02 Apr 2008 16:38:36 +0200
- To: "Ian Hickson" <ian@hixie.ch>, "Sam Ruby" <rubys@us.ibm.com>, "Neil Soiffer" <Neils@dessci.com>
- Cc: public-html@w3.org, www-math@w3.org
On Wed, 02 Apr 2008 03:57:08 +0200, Ian Hickson <ian@hixie.ch> wrote: > HTML5 today has about 110 elements. Presentational MathML has about 30. > Content MathML has about 140. > > _Doubling_ the number of elements allowed in text/html just so that all > those elements can be ignored seems like a fundamentally bad idea. (It > also more than doubles the number of elements that the parser has to know > about.) Until I see actual pages that contain non-MathML in <math> or non-SVG in <svg>, I'm not convinced that Henri's scoped parsing proposal[1] doesn't work. Do you perhaps have such data at hand so I can take a look and be convinced? :-) If there are a non-trivial amount of pages that have HTML elements in <math> or <svg> (not nested in <foreignObject>/<annotation-xml>), then wouldn't it be possible to special-case HTML elements in <math>/<svg> and let the rest be handled as "unknown" elements in the MathML/SVG namespaces (so that, e.g., <math><foo><b> is interpreted as <mml:math><mml:foo><html:b>)? It seems to me that special-casing the MathML and SVG elements is only needed if there are a non-trivial amount of pages that have *unknown* elements in <math> or <svg> (ignoring nested in <foreignObject>/<annotation-xml>) *and* expect HTML semantics of those elements that are incompatible with MathML/SVG semantics (e.g., <math><foo tabindex=0>). No? Also, on a slightly different note, I think that for copy-pastability of SVG in text/html, the parser needs to make /> self-close elements, since e.g. <circle> can have contents (e.g. animation stuff, I think) and Sam Ruby said that some tools emit <defs/> and <g/>. [2] [1] http://lists.w3.org/Archives/Public/public-html/2007Oct/0158.html [2] http://www.w3.org/mid/OF5C94F918.283CF133-ON8525741E.0069F26F-8525741E.006C12C5@us.ibm.com -- Simon Pieters Opera Software
Received on Wednesday, 2 April 2008 14:39:34 UTC