Validation and duplicate Tags...

I'm using Xerces too and validating works perfectly. Are you sure validation is on?

This how I do it for the SAXParser:

p.setFeature("http://xml.org/sax/features/validation", true);

You can find more information under 'Futures' in the Xerces home page. If you already know about it excuse me for all this extra information, but, as I said before, I'm using validation and works.

Good luck!

llturro at 2007-6-29 0:11:12 >

I have an XML document with the dtd:

<!ELEMENT attr_cert (ver,serialNo,own,issuerName,issuerUI,valid,attr+,ext*,sigAlg,sig)>

<!ELEMENT ver (#PCDATA)>

<!ELEMENT serialNo (#PCDATA)>

<!ELEMENT own (#PCDATA)>

<!ELEMENT issuerName (#PCDATA)>

<!ELEMENT issuerUI (CDATA)>

<!ELEMENT valid (notBefore,notAfter)>

<!ELEMENT notBefore (CDATA)>

<!ELEMENT notAfter (CDATA)>

<!ELEMENT attr (CDATA)>

<!ELEMENT ext (#PCDATA)>

<!ELEMENT sigAlg (#PCDATA)>

<!ELEMENT sig (CDATA)>

and I'm using the DOM parser ( Xerces version 1.3.0 )

now... the elements have to appear only ONCE...

i turn validation on and most other features for that matter but the parser doesn't complain when I parse an invalid file...

Dunno about the new version of Xerces though... if it is an issue of Xerces1.3.0 then i apologise...

here's my complete code (if needed anyway):

import org.w3c.dom.Node;

import org.w3c.dom.traversal.NodeFilter;

import org.apache.xerces.parsers.DOMParser;

import org.apache.xerces.dom.*;

import org.xml.sax.SAXNotRecognizedException;

import org.xml.sax.SAXNotSupportedException;

import org.xml.sax.SAXException;

import java.io.File;

import java.io.IOException;

/** Attribute Certificate parser/validator class.

* This class implements a DOM parser which parses an XML document

* of the <code>attr_cert</code> Doctype and displays its fields in

* a human-readable format.

*/

public class ParseCert

{

public static void main(String args[]) {

if ((args == null) || (args.length < 1)) {

System.out.println("Usage: java ParseCert <Attribute Certificate Filename>");

System.exit(0);

}

File xml_doc = new File(args[0]);

if ( !(xml_doc.exists()) ) {

System.out.println("File "+ xml_doc.getName() +" does not exist!");

System.exit(-1);

}

try {

//create an object of the Document implementation class

DOMParser parser = new DOMParser();

try {

//include the external DTD

parser.setFeature("http://xml.org/sax/features/external-parameter-entities", true);

//Turn validation on...

parser.setFeature("http://xml.org/sax/features/validation", true);

//enable dynamic validation

parser.setFeature("http://apache.org/xml/features/validation/dynamic", true);

//Parse the document

parser.parse( xml_doc.getName() );

} catch (IOException ioe) {

ioe.printStackTrace();

} catch (SAXNotSupportedException nse) {

nse.printStackTrace();

} catch (SAXNotRecognizedException nre) {

nre.printStackTrace();

}

DocumentImpl document = (DocumentImpl)parser.getDocument();

//check whether we have a valid doctype

if ( !document.getDoctype().getName().equalsIgnoreCase("attr_cert") ) {

System.out.println("File " + xml_doc.getName() +

" is not a valid Attribute Certificate!");

System.exit(-1);

}

//get the root of the XML document

Node root = (Node)document.getDocumentElement();

//instantiate a filter

AllElements allelements = new AllElements();

//create an object of the NodeIterator implementation class

NodeIteratorImpl iterator =

(NodeIteratorImpl)document.createNodeIterator(root,

NodeFilter.SHOW_ALL, (NodeFilter)allelements, true);

//recursively print all elements of the XML document

printElements(iterator);

} catch (Exception e) {

System.out.println("error: " + e);

e.printStackTrace();

System.exit(0);

}

}

//recursive function that prints all elements of the XML document

public static void printElements(NodeIteratorImpl iter)

{

Node n;

System.out.println("--BEGIN ATTRIBUTE CERTIFICATE--");

while ((n = iter.nextNode()) != null) {

if (n.getNodeName().equalsIgnoreCase("ver"))

System.out.println( "Version: \t\t" + n.getLastChild().getNodeValue() );

if (n.getNodeName().equalsIgnoreCase("serialNo"))

System.out.println( "Serial No.: \t\t" + n.getLastChild().getNodeValue() );

if (n.getNodeName().equalsIgnoreCase("own"))

System.out.println( "Owner : \t\t" + n.getLastChild().getNodeValue() );

if (n.getNodeName().equalsIgnoreCase("issuerName"))

System.out.println( "Issuer Name: \t\t" + n.getLastChild().getNodeValue() );

if (n.getNodeName().equalsIgnoreCase("issuerUI"))

System.out.println( "Issuer Unique ID: \t" + n.getLastChild().getNodeValue() );

if (n.getNodeName().equalsIgnoreCase("valid"))

System.out.println( "Validity:");

if (n.getNodeName().equalsIgnoreCase("notBefore"))

System.out.println( "\tnotBefore: \t" + n.getLastChild().getNodeValue() );

if (n.getNodeName().equalsIgnoreCase("notAfter"))

System.out.println( "\tnotAfter: \t" + n.getLastChild().getNodeValue() );

if (n.getNodeName().equalsIgnoreCase("attr"))

System.out.println( "<Biometric Attribute Field>");

if (n.getNodeName().equalsIgnoreCase("ext"))

System.out.println( "<Extension Field>" );

if (n.getNodeName().equalsIgnoreCase("sigAlg"))

System.out.println( "Signature Algorithm: \t" + n.getLastChild().getNodeValue() );

if (n.getNodeName().equalsIgnoreCase("sig"))

System.out.println( "Signature: \n" + n.getLastChild().getNodeValue() );

}

System.out.println("--END ATTRIBUTE CERTIFICATE--");

}

}

//filters elements in the XML document; Returns all the Element nodes

class AllElements implements NodeFilter

{

public short acceptNode (Node n)

{

if (n.getNodeType() == Node.ELEMENT_NODE)

return FILTER_ACCEPT;

return FILTER_SKIP;

}

}

Jim_Warlock at 2007-6-29 0:11:18 >