org.xml.sax.SAXParseException: cvc-elt.1: Cannot find the declaration of element 'xdtfnse'

[Pierpaolo Vittorini]

As a couple of dozen of million users, I need to validate an xml document 
against an xml schema.

The (relevant portion of the) XML schema follows:

<?xml version="1.0"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema";
            targetNamespace="http://www.med.univaq.it/vittorini/xdtfnse";
            xmlns="http://www.med.univaq.it/vittorini/xdtfnse";>

  <xsd:element name="xdtfnse">
    <xsd:complexType>
      <xsd:sequence>
          ...SEVERAL ELEMENTS HERE...
      </xsd:sequence>
    </xsd:complexType>
  </xsd:element>

</xsd:schema>

The (relevant portion of the) XML document follows:

<?xml version="1.0"?>
<xdtfnse xmlns="http://www.med.univaq.it/vittorini/xdtfnse";
         targetNamespace="http://www.med.univaq.it/vittorini/xdtfnse";
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
         xsi:schemaLocation=
                        "http://www.med.univaq.it/vittorini/xdtfnse
                        xdtfnse.xsd">
        ...  CONTENT ...
</xdtfnse>

Therefore, I wrote a validator in Java (Xerces is xercesImpl-2.8.1.jar):

try {
      SchemaFactory factory = 
SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
      Schema schema = factory.newSchema(new File("xdtfnse.xsd"));
      Validator validator = schema.newValidator();
      DocumentBuilder parser = 
DocumentBuilderFactory.newInstance().newDocumentBuilder();
      Document document = parser.parse(new File("doc.xml"));
      validator.validate(new DOMSource(document));
} catch (Exception e) {
      e.printStackTrace();
}

Unfortunately, when I try to validate the above XML document against the 
Schema, I get the following error:

org.xml.sax.SAXParseException: cvc-elt.1: Cannot find the declaration of 
element 'xdtfnse'.

Question is: wrong namespace? namespace not correctly specified?

After several long searches in the web, I could not find any solution.
Please help me or please let me know where to find an answer.

Kind regards and please apologize if this question already appeared in the 
mailing list, but -- again -- all I found/read about this problem didn't 
suffice.

Pierpaolo Vittorini.

-- 
Pierpaolo Vittorini, PhD
Assistant Professor
INF/01 - Computer science
Department of Internal Medicine and Public Health
Via S. Salvatore - Edificio Delta 6 - 67010 L'Aquila fraz. Coppito
ITALY

E-mail address: [EMAIL PROTECTED]
Personal web page: http://www.med.univaq.it/vittorini
Phone: +39 0862 434650
Fax: +39 0862 434656

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