http://xml.apache.org/commons/components/external/: xml-commons provides an Apache-hosted set of DOM, SAX, and JAXP interfaces for use in other xml-based projects. Our hope is that we can standardize on both a common version and packaging scheme for these critical XML standards interfaces to make the lives of both our developers and users easier. The External Components portion of xml-commons contains interfaces that are defined by external standards organizations. For DOM, that's the W3C; for SAX it's David Megginson and sax.sourceforge.net; for JAXP it's Sun. 
/*
 * Copyright (c) 2004 World Wide Web Consortium,
 *
 * (Massachusetts Institute of Technology, European Research Consortium for
 * Informatics and Mathematics, Keio University). All Rights Reserved. This
 * work is distributed under the W3C(r) Software License [1] in the hope that
 * it will be useful, but WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *
 * [1] http://www.w3.org/Consortium/Legal/2002/copyright-software-20021231
 */

package org.w3c.dom.ls;


 Parser or write operations may throw an LSException if the 
processing is stopped. The processing can be stopped due to a 
DOMError with a severity of 
DOMError.SEVERITY_FATAL_ERROR or a non recovered 
DOMError.SEVERITY_ERROR, or if 
DOMErrorHandler.handleError() returned false. 

Note:  As suggested in the definition of the constants in the 
DOMError interface, a DOM implementation may choose to 
continue after a fatal error, but the resulting DOM tree is then 
implementation dependent. 

See also the Document Object Model (DOM) Level 3 Load
and Save Specification.

/**
 *  Parser or write operations may throw an <code>LSException</code> if the 
 * processing is stopped. The processing can be stopped due to a 
 * <code>DOMError</code> with a severity of 
 * <code>DOMError.SEVERITY_FATAL_ERROR</code> or a non recovered 
 * <code>DOMError.SEVERITY_ERROR</code>, or if 
 * <code>DOMErrorHandler.handleError()</code> returned <code>false</code>. 
 * <p ><b>Note:</b>  As suggested in the definition of the constants in the 
 * <code>DOMError</code> interface, a DOM implementation may choose to 
 * continue after a fatal error, but the resulting DOM tree is then 
 * implementation dependent. 
 * <p>See also the <a href='http://www.w3.org/TR/2004/REC-DOM-Level-3-LS-20040407'>Document Object Model (DOM) Level 3 Load
and Save Specification</a>.
 */
public class LSException extends RuntimeException {
    public LSException(short code, String message) {
       super(message);
       this.code = code;
    }
    public short   code;
    // LSExceptionCode
    
 If an attempt was made to load a document, or an XML Fragment, using 
LSParser and the processing has been stopped. 

/**
     *  If an attempt was made to load a document, or an XML Fragment, using 
     * <code>LSParser</code> and the processing has been stopped. 
     */
    public static final short PARSE_ERR                 = 81;
    
 If an attempt was made to serialize a Node using 
LSSerializer and the processing has been stopped. 

/**
     *  If an attempt was made to serialize a <code>Node</code> using 
     * <code>LSSerializer</code> and the processing has been stopped. 
     */
    public static final short SERIALIZE_ERR             = 82;

}