From: Michel Fortin <michel.fortin@michelf.com>

Date: Fri, 2 Jun 2006 11:16:48 -0400

Message-ID: <F0C5EDD4-88E7-4F24-87F6-AD44E0218671@michelf.com>

Date: Fri, 2 Jun 2006 11:16:48 -0400

Message-ID: <F0C5EDD4-88E7-4F24-87F6-AD44E0218671@michelf.com>

Le 2 juin 2006 ? 5:08, White Lynx a ?crit : > 1) Which markup do you think fits better in the scope of HTML5? > a) > <div> > (X)HTML document may contain math formulae, like > <formula> > ax<sup>2</sup> + bx + c = 0 > </formula> > </div> While this may be better than the MathML counterpart, I'd prefer this markup: <p> (X)HTML document may contain math formulae, like <formula> <var>a</var><var>x</var><sup>2</sup> + <var>b</var><var>x</var> + <var>c</var> = 0 </formula> </p> It's more verbose than what you suggested, but still way simpler than MathML. The advantage of this notation is that a software tool could deduce the semantics using the following rules: * Each <var> element represents a variable (permitting words to be used as variable when appropriate). * <sup> contains the exponent of the preceding element or number. By understanding "+" and "=" as operators, "0" as a number and by applying the usual operator precedence, a tool could convert that to something understandable by other math software. Of course, people could still write equations in a non-verbose/non- semantical way, without <var>, but nothing is going to prevent that anyway. What's interesting is that if you forget some <var> tags, you notice it immediately from the browser rendering as the variables aren't italic. There is tag with "invisible" effect. The other point I'd like to make is that a formula element shouldn't be required for all mathematical expressions. If I want talk about variable x in the middle a paragraph, I shouldn't need to surround it like this: <formula><var>x</var></formula>. Using <var>x</var> ought to be suffisent. The same applies if I want to include x^2 in the text, <var>x</var><sup>2</sup> should be enough. <formula> could be used however for more important formulas, those which are alone and centered on their line in the typical math or science book. Indeed, it would provide a CSS hook to do just that, which means that, again, there is tag with "invisible" effect. Michel Fortin michel.fortin at michelf.com http://www.michelf.com/Received on Friday, 2 June 2006 08:16:48 UTC

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