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   Re: [xml-dev] Java NVDL implementation

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Jirka Kosek said:
> Chiusano Joseph wrote:
>> I understand that there were some issues in the past regarding some
>> NVDL implementation supporting W3C Schema (I don't recall which one,
>> assuming that there are more than one). Can you please confirm that
>> your implementation fully supports W3C Schema, in addition to RNG?
> JNVDL just creates fragments from validated document and these fragments
> are then passed to respective validators for validation against specific
> schema (be it WXS, RNG, or whatever else). JNVDL uses standard JAXP 1.3
> validation API, so any validator which supports this API can be used for
> WXS validation.

ISO DSDL was developed in part as a reaction against the
PSVI/Type-Annotation approach adopted by XML Schemas.

The problem with PSVI/Type-Annotation (as implemented) is that it is not
XML: it requires a different set of APIs (err, where are the standards?)
and indeed a whole different set of technology. (This is not to say that
type annotation or augmented DOMs etc are not useful and appropriate in
their place of course.)

So the ISO DSDL parts try to take an "XML-in/XML-out" approach. NVDL is
probably the main example of this.

Rick Jelliffe


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