Re: MathML DOM implementation: I need some advise

Hi,

>as I said you should be able to implement it without knowing Gdome2
>internals if we assume for instance that upcasting from a MathML element
>to a DOM element is done via an explicit method call and not simply a C
>cast. This is quite reasonable after all since C has no knowledge of
>what upcasting really is...
I will follow this. But I cannot hide the fact that the Gdome2 code will
inspire me.

>
>For the automatic generation, most of the IDL attributes in MathML DOM
>interfaces correspond to XML attributes, so all the code to get/set
>their value can be generated. Also, the list of parameters, the
>correspondence of IDL types with C types, the extra methods provided by
>every implementation (such as the up/down casts, constructors and
>similar others), can be generated with great benefit for future
>maintenance.
>
I will have a big stylesheet at the end ... ;)

>In gmetadom we're doing this for generating the bindings directly from
>the XML encoding of the W3C spec for DOM. I assume the MathML spec also
>has a similar XML encoding. From there, it is quite easy to write XSLT
>stylesheets that generate real code. You can have a look at gmetadom
>sources for examples of such stylesheets. In your case however, you
>wouldn't be able to generate ALL the code: at most you'll be able to
>generate prototypes and methods with an empty body to be filled by hand.
>Or, you can provide the method bodies and any other missing information
>in a separate set of XML files and combine them with the XML files for
>MathML DOM. You can see an example of this technique in gmetadom again
>(Ocaml binding), where we keep a parallel set of XML files to know which
>arguments can be "nullable", that is which parameters can accept a NULL
>value. This is an example of missing information that cannot be inferred
>safely from the spec.
>
I will reuse the stuff from gmetadom-0.2.0/src/gdome_caml/xsl/xml2c.xsl
and use as input the mathml-dom.xml coming with the MathML2 specification.

>If you're interested in going this way feel free to ask for more
>information.
>
You're giving me great information. Thanks a lot!

  Pierre-Paul

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