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RE: [Xerces-J] DOM and Schema information

• To: "'Charles Francoise'" <loderunnr@g...>,<xml-dev@l...>
• Subject: RE: [Xerces-J] DOM and Schema information
• From: "Michael Kay" <mike@s...>
• Date: Mon, 27 Jun 2005 17:58:16 +0100
• In-reply-to: <42C02C27.2060807@g...>
• Thread-index: AcV7N2nlbjB/6KexS+abStlXdLZlFQAAbUKA

DOM3 (in JAXP 1.3 and/or JDK 1.5) supports the methods
Element.getSchemaTypeInfo() and Attr.getSchemaTypeInfo(). These give you
some basic information about the type. In the Saxon implementation you can
get more detailed information by casting the resulting TypeInfo object to a
Saxon-specific class; I imagine the same is true in the Xerces
implementation.

Michael Kay
http://www.saxonica.com/ 

> -----Original Message-----
> From: Charles Francoise [mailto:loderunnr@g...] 
> Sent: 27 June 2005 17:41
> To: xml-dev@l...
> Subject:  [Xerces-J] DOM and Schema information
> 
> 
> I'm parsing an XML file with Xerces and DOM. I validate my 
> XML Instance 
> against a schema without problems.
> I'd like to obtain some schema information on the nodes though, in 
> particular, I'd like to know what type they are declared to be in the 
> schema.
> I understand that this information can be found through the 
> PSVI, but I 
> can't seem to access it. When I try to obtain my schema 
> information by 
> using:
> rootPSVI.getSchemaInformation()
> I get null.
> Using a debugger, I can also see that all the information concerning 
> validation and PSVI is not affected. Validation is performed 
> though, I 
> can see the errors in case of an invalid XML instance.
> 
> Is there something I forgot to do ? Is there another way to 
> access this ?
> Thank you for your help.
> 
> Charles
> 
> 
> 
> Here is the code I use:
> DOMParser parser = new DOMParser();
> parser.setProperty("http://apache.org/xml/properties/dom/docum
> ent-class-name","org.apache.xerces.dom.PSVIDocumentImpl");
> parser.setFeature("http://xml.org/sax/features/validation", true);
> parser.setFeature("http://apache.org/xml/features/validation/s
> chema", true);
> parser.setFeature("http://apache.org/xml/features/validation/s
> chema-full-checking",true);
> parser.setFeature("http://xml.org/sax/features/namespaces",true);
> parser.parse(file.toURI().toString());
> Document doc = parser.getDocument();
> ElementPSVI rootPSVI = (ElementPSVI) doc.getDocumentElement();
> XSModel schema = rootPSVI.getSchemaInformation();
> 
> 
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• References:
  • [Xerces-J] DOM and Schema information
    • From: Charles Francoise <loderunnr@g...>

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