Trouble parsing DTD

Question

I'm trying to parse a DTD with Java using the code below. Using the XMLParser the parsing works fine, but when I try to use the DOMParser nothing works, I end up with the errors like
"XML-0230: (Error) Illegal change of encoding: from UCS-2 to Unicode.
XML-0192: (Fatal Error) Unexpected text in DTD."
I've tried to change the encoding and remove the "unexpected" text, but I always end up with another error.
I could use the XMLParser, but when I try to generate classes with the oracle.xml.classgen.ClassGenerator, the method generator.generate(dtd, doctype_name) requires the dtd to be of type oracle.xml.parser.v2.DTD whilst the xmlParser.getDoctype() returns a DTD of type oracle.xml.parser.DTD. I don't understand how to convert one type to the other.
Even worse, if I change the DTD the slightest, i e remove one single comment, the parsing fails. The parser starts complaining of illegal change of encoding.
I'm posting a small snippet of the DTD. This snippet is hasn't been possible to parse for me due to all the errors. However, if I parse the whole DTD with the XMLParser it works fine. The whole DTD is too big to post.
Java code:
oracle.xml.parser.XMLParser xmlParser = new XMLParser();
xmlParser.parseDTD(fileToURL(dtdFile), rootName);
oracle.xml.parser.v2.DOMParser DOMParser domParser = new DOMParser();
domParser.setDebugMode(true);
domParser.setErrorStream(System.out);
domParser.setValidationMode(false);
domParser.parseDTD(fileToURL(dtdFile), rootName);
oracle.xml.parser.v2.DTD dtd_v2 =(oracle.xml.parser.v2.DTD)domParser.getDoctype();
oracle.xml.parser.DTD dtd_v1 = (oracle.xml.parser.DTD)xmlParser.getDoctype();
DTD file:
<?xml version="1.0" encoding="Unicode"?>
<!DOCTYPE DMP_xml_defs [
<!ELEMENT CompanyQuery CompEmployees CDATA>
<!ATTLIST CompanyQuery Employees CDATA>
<!ATTLIST CompanyQuery CompTurnover CDATA>
<!ATTLIST CompanyQuery SNI CDATA>
<!ATTLIST CompanyQuery SNILevel (1|2|3|4|5|6|)
<!ATTLIST CompanyQuery Heading CDATA>
<!ATTLIST CompanyQuery CompType CDATA>
]>

Answer 1

A DTD file is not an XML file, and not amenable to parsing with an XML parser. Parse a DTD with a DTD parser.
Wutka DTD Parser:http://www.wutka.com/dtdparser.html