[om] MathML and OpenMath on csymbol syntax

[David Carlisle]

    <apply> 
    <csymbol encoding="OpenMath"
             definitionURL="http://www.openmath.org/cd/BesselFunctions.ocd">
      <msub><mi>J</mi><mn>0</mn></msub> 
    </csymbol> 
    <ci>y</ci> 
    </apply>
    
    <apply>
      <csymbol encoding="OpenMath"
               definitionURL="http://www.openmath.org/cd/BesselFunctions.ocd">
        BesselJ
      </csymbol>
    </apply>
    
    It seems
    that the OpenMath suggestion is actually translatable (since an OMS
    needs the function name), but for MathML, the presentation data is
    also important. Which approach is being used by people? 


The default presentation of a csymbol is its content so  unless you want
it to appear as BesselJ(y) then the first form looks more correct.
As you comment though for translation from/to MathML you really want to
keep the OM symbol name in the encoding somewhere.

I think that the best place to put this is in the definitionURL as in

    <apply> 
    <csymbol encoding="OpenMath"
             definitionURL="http://www.openmath.org/cd/BesselFunctions.ocd#BesselJ">
      <msub><mi>J</mi><mn>0</mn></msub> 
    </csymbol> 
    <ci>y</ci> 
    </apply>
    


David

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