Re: [Vtd-xml-users] xerces discussion on VTD

[Boris K. <bo...@co...>]

Hi,

Paul Tomsic <pt...@gm...> writes:

> i'd love to see VTD support XSD's, specifically schema validation,

I think there will be problems similar to what one would encounter
implementing support for DTD. XML Schema has a number of places
where the document is modified, including default attribute and
element expansion, value normalization (e.g., removing of white-
spaces), etc.


Tatu Saloranta <cow...@ya...> writes:

> It does not (and probably will not) handle DTDs:
> validation is not the problem (it could be
> implemented), but entities are, and perhaps things
> like attribute defaulting and normalization. This may
> be problematic for document-centric approaches, but
> usually is not for data-centric (like SOAP messages
> etc)

=46rom my experience both use things like default attributes
and data normalization equally often. Also note that if
you are really into speed/space optimization for data-
centric applications then the way to go is to parse the
data directly into business objects rather than creating
a raw representation of XML. Also implementing validation
by generating schema-specific validators helps a lot, as
shown in this benchmark:

http://www.codesynthesis.com/projects/xsdbench/


hth,
-boris


--=20
Boris Kolpackov
Code Synthesis Tools CC
http://www.codesynthesis.com
Open-Source, Cross-Platform C++ XML Data Binding