How do I parse a DTD in Java?

[Andrews, Scott]

How do I parse a DTD into an in-memory Java object, like a TreeMap or perhaps some XML specific collection class?   I asked this question the other day, and got an answer that the DocumentBuilder parse method should handle the parsing of a DTD – since a DTD IS XML.   However, I get basic parsing errors when inputting a simple DTD.  The code works fine on XML documents, but not on DTDs.  The code I’m using to parse the DTD looks like this:        public static void main( String argArgs[] ) {      {             File dtdFile = new File( "C:\\APIS\\WorkSpace\\tv.dtd" );             DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();             DocumentBuilder db = dbf.newDocumentBuilder();                        Document document = db.parse( dtdFile );                        parseChildrenRecursivly( document.getChildNodes();  );      }          public void parseChildrenRecursivly( NodeList argNodeList ) {               if (argNodeList == null) {                 return;             }                         Node node;             for (int i=0; i<argNodeList.getLength(); i++) {                  node = argNodeList.item( i );                  if (node.getNodeType() != Node.TEXT_NODE) {                      System.out.println(                         "node.nodeName = " + node.getNodeName() + "; " +                                         "node.nodeType = " + Short.toString( node.getNodeType() ) + "; " +                                            "node.localName = " + node.getLocalName() + "; " +                         "node.namespaceUri = " + node.getNamespaceURI() + "; " +                         "node.nodeValue = " + node.getNodeValue() + "; " +                         ""                      );                      parseChildrenRecursivly( node.getChildNodes() );                  }             } // for             }   However, I get errors when making the attempt:   [Fatal Error] :-1:-1: Premature end of file. ERR:> Exception Premature end of file.   The DTD I’m trying to parse is just an example.  It looks like this, where the elements are embedded inside the DOCTYPE tag:   <!DOCTYPE TVSCHEDULE [   <!ELEMENT TVSCHEDULE (CHANNEL+)> <!ELEMENT CHANNEL (BANNER, DAY+)> <!ELEMENT BANNER (#PCDATA)> <!ELEMENT DAY ((DATE, HOLIDAY) | (DATE, PROGRAMSLOT+))+> <!ELEMENT HOLIDAY (#PCDATA)> <!ELEMENT DATE (#PCDATA)> <!ELEMENT PROGRAMSLOT (TIME, TITLE, DESCRIPTION?)> <!ELEMENT TIME (#PCDATA)> <!ELEMENT TITLE (#PCDATA)> <!ELEMENT DESCRIPTION (#PCDATA)>   <!ATTLIST TVSCHEDULE NAME CDATA #REQUIRED> <!ATTLIST CHANNEL CHAN CDATA #REQUIRED> <!ATTLIST PROGRAMSLOT VTR CDATA #IMPLIED> <!ATTLIST TITLE RATING CDATA #IMPLIED> <!ATTLIST TITLE LANGUAGE CDATA #IMPLIED>   ]>   If I just parse the ELEMENTS, by removing the DOCTYPE tag, I still get errors:   Exception The markup in the document preceding the root element must be well-formed. [Fatal Error] tv.dtd:3:3: The markup in the document preceding the root element must be well-formed.   Anybody have a clue how to parse a DTD, so I can get an in-memory structure of the DTD in Java?     Scott Andrews Principle Software Engineer Concurrent Technologies Corporation (814) 269 6580 (Monday, Wednesday, Friday) (814) 632 9559 (Tuesday, Thursday) (814) 880 8522 (Cell)