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Re: [xml-dev] Big hierarchy of XML Schema documents ... which XML Schemavalidators bring in the documents on demand?

Xerces-J eagerly loads all includes/imports (recursively) before constructing its schema component model. See XSDHandler [1]. I imagine Xerces-C++/P would have a similar design.

Thanks.

[1] http://svn.apache.org/viewvc/xerces/java/trunk/src/org/apache/xerces/impl/xs/traversers/XSDHandler.java?view=markup&pathrev=949234

Michael Glavassevich
XML Parser Development
IBM Toronto Lab
E-mail: mrglavas@ca.ibm.com

E-mail: mrglavas@apache.org

"Costello, Roger L." <costello@mitre.org> wrote on 07/28/2010 04:05:24 PM:

> Hi Folks,
>
> Suppose that my XML Schema imports/includes some XML Schemas and
> they import/include some XML Schemas and so on. That is, there is a
> big hierarchy of XML Schema documents.
>
> I envision two ways that XML Schema validators could be implemented:
>
> 1. On-demand: the validator brings in an XML Schema document only
> when it's needed. (On-demand/Just-in-time/Dynamic-Loading)
>
> 2. Not on-demand: when the validator brings in an XML Schema
> document it also brings in the XML Schema documents it imports/
> includes and the documents they import/include and so on. (What is
> the right term for this?)
>
> I am interested to know how these XML Schema validators operate with
> regard to being on-demand or not. Can you help to fill in this table please:
>
>                  On-demand      Not on-demand
> SAXON (Java)
>
> SAXON (.NET)
>
> XERCES (Java)
>
> XERCES (C++)
>
> XERCES (Perl)
>
> LIBXML
>
> MSXML
>
> XSV
>
>
> /Roger
>
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