Re: validate an XML against an XSD

Raju Sunny wrote:
> Hei sorry for the completely foolish question..

Isn't this the same question ?

> i need to validate an XML file against an xsd in perl
> IS there any way for doing that using xerces c

Create a parser like this:

>     my $parser = XML::Xerces::XMLReaderFactory::createXMLReader();
> 
>     $parser->setFeature("$XML::Xerces::XMLUni::fgSAX2CoreNameSpaces", 1);
> 
>     $parser->setFeature("$XML::Xerces::XMLUni::fgSAX2CoreValidation", 1);
>     $parser->setFeature("$XML::Xerces::XMLUni::fgXercesSchema", 1);

This creates a parser with the features required for schema validation.

Then feed this parser XML which specifies a schemaLocation in the
root element like e.g.

> <myelement xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
 > xsi:schemaLocation="http://my.schema.loc/schema file:/schemas/s1.xsd">

You'll have to be prepared to catch and handle validation exceptions
in the code:

>     eval
>     {
>         $parser->parse(XML::Xerces::MemBufInputSource->new($args{xml}));
>     };
>     if ($@)
>     {

AFAIK, Xerces-C does not allow you to override the schema specified
by the XML document via the fgXercesSchemaExternalSchemaLocation
feature i.e. you can't create a parser and tell it always to
validate against a specific schema; you have to live with what's
specified in the document.

-- 
Regards

Stephen Collyer
Netspinner Ltd