Re: [xml] Accessing {DTD, RelaxNG, X-Schema} Structure using libxml2

[Daniel Veillard <veillard redhat com>]

On Sun, Sep 11, 2005 at 01:01:54AM +0200, Oliver Schonefeld wrote:
> Hi,
>
> I am currently in need of parsing xml schema languages and using the result
> to implement a validation for xml-like documents[1].
> Basically I want to parse the grammar (DTD, RelaxNG or XSchema) and my
> parser should be able to ask: given grammer a,
> 1) is element x valid in my current processing context y
> 2) is attribute x valid on element y
> I tried to check the API docs, but it seems libxml does not allow this kind
> of access pattern or only using xmlDocPtr structures.
> Did I miss something? If not, does anybody know some alterantives?

  Question 1) and 2) are way to generic to get an answer. For example
you may just can't answer in the absolute in some Relax-NG schemas. For DTD
there are functions to do this. In XSD we don't export this kind of
API though they exist internally. 

Daniel

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