PrefixLister

import org.apache.xerces.xni.parser.XMLInputSource;
import org.apache.xerces.xni.XNIException;
import org.cyberneko.pull.*;
import org.cyberneko.pull.event.*;
import org.cyberneko.pull.parsers.Xerces2;
import java.io.IOException;

 
public class PrefixLister {

  public static void main(String[] args) {
        
    if (args.length == 0) {
      System.err.println("Usage: java PrefixLister url" );
      return;   
    }
        
    try {
      XMLPullParser parser = new Xerces2();
      XMLInputSource source = new XMLInputSource(null, args[0], null);
      parser.setInputSource(source);
        
      XMLEvent event;
      while ((event = parser.nextEvent()) != null) {
        if (event.type == XMLEvent.PREFIX_MAPPING) { 
            PrefixMappingEvent mapping = (PrefixMappingEvent) event;
            System.out.println("Prefix: " + mapping.prefix);
            System.out.println("URI:    " + mapping.uri);
            System.out.println();
        }
      }
    }
    catch (XNIException ex) {
       System.out.println(args[0] + " is not well-formed"); 
       System.out.println(ex);  
    }
    catch (IOException ex) {
      System.out.println(args[0] + " could not be checked due to an " 
       + ex.getClass().getName());  
      ex.printStackTrace();      
    }
        
  }

}