From: <juanrgonzaleza@canonicalscience.com>

Date: Mon, 17 Jul 2006 06:31:58 -0700 (PDT)

Message-ID: <3251.217.124.69.242.1153143118.squirrel@webmail.canonicalscience.com>

To: <www-math@w3.org>

Date: Mon, 17 Jul 2006 06:31:58 -0700 (PDT)

Message-ID: <3251.217.124.69.242.1153143118.squirrel@webmail.canonicalscience.com>

To: <www-math@w3.org>

David Carlisle said: > >>I forget to cite the trouble with decimal sign. > what exactly is the trouble that you see, and what maekup would you > suggest that didnt have the same problem? Is asuming presentational representation of concept. somewhat as i in imaginary numbers is presentational somewhat as / in rational is also presentational. If there is emphasis on elimination of presentational "," "/", "i" and even "+" from encoding of numbers (4.4.1.1.3 Examples). I see natural also that presentational symbol for decimals was substituted. One could use some entity for the decimal mark but i find more interesting markup. <cn type="rational"> 12342 <sep/> 2342342 </cn> <cn type="complex-cartesian"> 12.3 <sep/> 5 </cn> <cn type="complex-polar"> 2 <sep/> 3.1415 </cn> maybe just something like <cn type="real"> 12345 <sep/> 7 </cn> with default renderings 12342 / 2342342 12.3 + 5 i Polar( 2 , 3.1415 ) and 12345.7 >> content MathML would not asume >> presentational stuff for something like 3.1416, rendered as 3.1416 or >> 3,1416 (Spain). > > Nothing in the MathML specification assumes that <cn>3.1416</cn> is > rendered as 3.1416. if a system renders it as 3,1416 then that os > perfectly conformant. The presentational stuff is in the encoding not in the rendering. Somewhat as a/b the "/" is presentational but, of course, you can render it as a/b, a ÷ b, a b^{-1}, or a - b > As would be an input document that used > <cn>3,1416</cn> Note that it's fairly easy to do this kind of change > while displaying from mathml markup as each number is explictly tagged > for example if you are using xsl to style your mathml you'd just add > <xsl:template match="m:cn"><xsl:value-of > select="translate(.,'.',',')"/></xsl:template> It is much harder to > cope with such presentational differences if > numbers are just part of an unmarked up text stream. <p>Notation in mathematics is dependant of countries, for example that English write as <math><cn type="real">12,345,678.90</cn></math> Spanish educators type as <math><cn type="real">12.345.678,90</cn></math></p> > David Juan R. Center for CANONICAL |SCIENCE)Received on Monday, 17 July 2006 13:56:28 UTC

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