How to use a schema and dtd at the same time?

Michael Nielsen (Info) 24 Sep 2002 06:46:59 -0000

Title: How to use a schema and dtd at the same time?

Im using the latest version of xerces and using DOM to construct a DOM document.

I have this problem using both the specified DTD and xml schema for validation at the same time.
The thing is that the xml document contains special html entities that needs to be resolved, otherwise the parser compliants.

Here the exception I get:
java.lang.Exception: XML-dokumentet kan ikke valideres: org.xml.sax.SAXParseException: Element type "asset" must be declared.org.xml.sax.SAXParseException: Element type "alias" must be declared.org.xml.sax.SAXParseException: Element type "field" must be declared.org.xml.sax.SAXParseException: Element type "text" must be declared.org.xml.sax.SAXParseException: Element type "field" must be declared.org.xml.sax.SAXParseException: Element type "xhtml" must be declared.org.xml.sax.SAXParseException: Element type "field" must be declared.org.xml.sax.SAXParseException: Element type "text" must be declared.org.xml.sax.SAXParseException: Element type "field" must be declared.org.xml.sax.SAXParseException: Element type "datetime" must be declared.org.xml.sax.SAXParseException: Element type "field" must be declared.org.xml.sax.SAXParseException: Element type "enumeration" must be declared.org.xml.sax.SAXParseException: Element type "text" must be declared.org.xml.sax.SAXParseException: Element type "field" must be declared.org.xml.sax.SAXParseException: Element type "text" must be declared.org.xml.sax.SAXParseException: Element type "field" must be declared.org.xml.sax.SAXParseException: Element type "text" must be declared.org.xml.sax.SAXParseException: Element type "field" must be declared.org.xml.sax.SAXParseException: Element type "enumeration" must be declared.org.xml.sax.SAXParseException: Element type "text" must be declared.org.xml.sax.SAXParseException: Element type "field" must be declared.org.xml.sax.SAXParseException: Element type "enumeration" must be declared.org.xml.sax.SAXParseException: Element type "text" must be declared.org.xml.sax.SAXParseException: Element type "field" must be declared.org.xml.sax.SAXParseException: Element type "association" must be declared.org.xml.sax.SAXParseException: Element type "asset" must be declared.org.xml.sax.SAXParseException: Element type "alias" must be declared.

Here is a snippet from the XML document:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE asset PUBLIC "-//W3C//ENTITIES Latin 1 for XHTML//EN" "http://legolas.dsb.dk:4520/mille/integration/xsd/xhtml-lat1.ent">

.....
</asset>

Note the dtd decleration in the <!DOCTYPE ...> element, that should resolve the special html entities.

And here parsing mechanism for the DOM parser constructed (code snippet):
The args are the xml doc. as a String object and the arg. specifying if validation should be done or not. (I ofcause has this arg as true).

public static Document parse(String source, boolean mustValidate) throws Exception {
    DOMParser parser = null;
    ParseErrorHandler handler = new ParseErrorHandler();
    try {
      parser = new org.apache.xerces.parsers.DOMParser();
      parser.setFeature("http://xml.org/sax/features/validation", mustValidate );
      parser.setFeature("http://apache.org/xml/features/validation/schema", mustValidate);
      parser.setFeature("http://apache.org/xml/features/dom/include-ignorable-whitespace", false);
      parser.setErrorHandler(handler);
      StringReader reader = new StringReader(source);
      parser.parse(new InputSource(reader));
      if(!handler.valid) {
        throw new Exception("XML-dokumentet kan ikke valideres: " + handler.msg);
      }
    } catch (SAXException e) {
      e.printStackTrace();
      throw new Exception("XML-dokumentet kan ikke valideres: " + e);
    } catch (IOException e) {
      e.printStackTrace();
      throw new Exception("XML-dokumentet kan ikke valideres: " + e);
    }
    Document doc = parser.getDocument();
    doc.normalize();
    return doc;
}

Can anybody please help! Its probable a matter of setting the right features or something. If anybody has expirienced anything similar please let me know!

Thanx!

Regards from
Michael Nielsen

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How to use a schema and dtd at the same time?

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