Validating xml-files inside jar-files for JWS

Question

I want to use xml-files inside a jar-file and want to validate them with dtd-files,
located in the same jar-file. This does work, but only as long as the dtd-file is
in the same directory as the xml-file.
For example, I have no problem, with a DOC Type-statement like
<!DOCTYPE questestinterop SYSTEM "ims_qtiv1p1.dtd" >
With this statement, however, one needs an approprate dtd in every directory containing an XML-file of that type.
If however i want to gather the necessary dtd's in a directory one (or more) levels above with a DOCTYPE-statement of the form
<!DOCTYPE questestinterop SYSTEM "../ims_qtiv1p1.dtd" >
I get error messages of the form
java.io.FileNotFoundException: JAR entry Mikro/Marshall/BookQuestions/../ims_qtiv1p1.dtd not found in C:\Dokumente und Einstellungen\wreiss\Anwendungsdaten\Sun\Java\Deployment\javaws\cache\http\Dwiwi.upb.de\P80\DM~vwl08\DMOViSS\DMoviss_current\RMMikro.jar
     at org.apache.crimson.parser.Parser2.fatal(Unknown Source)
     at org.apache.crimson.parser.Parser2.externalParameterEntity(Unknown Source)
     at org.apache.crimson.parser.Parser2.maybeDoctypeDecl(Unknown Source)
     at org.apache.crimson.parser.Parser2.parseInternal(Unknown Source)
     at org.apache.crimson.parser.Parser2.parse(Unknown Source)
     at org.apache.crimson.parser.XMLReaderImpl.parse(Unknown Source)
     at org.apache.crimson.jaxp.DocumentBuilderImpl.parse(Unknown Source)
     at javax.xml.parsers.DocumentBuilder.parse(Unknown Source)
     at oviss.competenceCenter.XMLExpert.setElements(XMLExpert.java:245)
though the dtd-file is in the parent-directory (inside the jar) and the unpacked xml-file can be successfully validated.
Why does this happen. How can one use a single dtd for multiple xml-files (of the same type) in different directories?.
Thanks
Winfried Reiss

Answer 1

In reply to myself, replacing the HTMLBrowser constructor with this;
public HTMLBrowser()
              URL url;
              try
                   // Construct the URL
                   url= this.getClass().getResource('/'+dir+'/'+startPage);
                   setPage(url);
              catch (Exception e)
              System.out.println( "Problem setting help homepage");
             setEditable(false);
             addHyperlinkListener(new LinkListener(this));
        }made it work. This is because seemingly you need '/' at the start of the resouce's path and '/' as the separator, regardless of platform.
I hope this helps someone else.
John