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Re: Content mathml - partial diffs, ranges

From: Michael Kohlhase <m.kohlhase@iu-bremen.de>
Date: Tue, 30 Sep 2003 16:23:18 +0200
Message-ID: <3F7991D6.4010001@iu-bremen.de>
To: "Jiri.Jirat" <jiratj@systinet.com>
Cc: www-math@w3.org

Jiri.Jirat wrote:

> 
> Hello,
>  I have some questions about content MathML.
> 
> How would you write  the following equations in content MathML?:
> 
> 1) 
> 
> E = 10-200 keV
> 
> (energy E is in range 10 to 200 keV)

I would use a csymbol element for the range. The problem is that you 
need to do something with the definitionURL attribute. One way is to 
supply a document that will define what you mean by this, this could be 
in a variety of formats for all the MathML spec cares, e.g. an OpenMath 
Content Dictionary (see http://www.openmath.org), or an OMDoc document 
(see http://www.mathweb.org/omdoc), or a plain html+mathml document.

<apply>
   <eq/>
   <ci>E</ci>
   <apply>
     <times>
     <apply>
       <csymbol definitionURL="http://www.example.org/ranges#range"/> 
      	<cn>20</cn>
         <cn>100</cn>
     </apply>
     <csymbol definitinURL="http://.../units/energy/keV">
       <mo>keV</mo>
     </csymbol>
   </apply>
</apply>
> 
> 
> 
> 2) 
> 
>  / dy \	      / dz \
> |  --  |   = |  --  |
>  \ dx / z     \ dx / y
> 
> ie.: dy/dx when z is constant 
> is equal to 
> dz/dx when y is constant.
> 
> BTW.: how to express in content MathML, that
> "x" is constant?
> 
> 
> Thank you very much for your suggestions.
> 

I would probably also use appropriate csymbol elements as well, I do not 
think that there are pre-defined symbols in MathML.

hope this helps.

Michael
> Regards
> Jiri Jirat
> 
> 
> 


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Received on Tuesday, 30 September 2003 10:23:12 GMT

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