Like SAX2's EntityResolver interface,
this interface lets  applications redirect references to external entities.
 
Java Binding:
package org.w3c.dom.loadSave;
public interface DOMEntityResolver {
    public DOMInputSource resolveEntity(String publicId, 
      String systemId ) throws DOMSystemException;
}
IDL:
  interface DOMEntityResolver {
    DOMInputSource resolveEntity(in DOMString publicId, 
                                 in DOMString systemId )
                                    raises(DOMSystemException);
  };