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Xerces2 is the next generation of high performance, fully compliant XML parsers in the Apache Xerces family. This new version of Xerces introduces the Xerces Native Interface (XNI), a complete framework for building parser components and configurations that is extremely modular and easy to program. The Apache Xerces2 parser is the reference implementation of XNI but other parser components, configurations, and parsers can be written using the Xerces Native Interface. For complete design and implementation documents, refer to the XNI Manual. Xerces2 is a fully conforming XML Schema 1.0 processor. A partial experimental implementation of the XML Schema 1.1 Structures and Datatypes Working Drafts (December 2009) and an experimental implementation of the XML Schema Definition Language (XSD): Component Designators (SCD) Candidate Recommendation (January 2010) are provided for evaluation. For more information, refer to the XML Schema page. Xerces2 also provides a complete implementation of the Document Object Model Level 3 Core and Load/Save W3C Recommendations and provides a complete implementation of the XML Inclusions (XInclude) W3C Recommendation. It also provides support for OASIS XML Catalogs v1.1. Xerces2 is able to parse documents written according to the XML 1.1 Recommendation, except that it does not yet provide an option to enable normalization checking as described in section 2.13 of this specification. It also handles namespaces according to the XML Namespaces 1.1 Recommendation, and will correctly serialize XML 1.1 documents if the DOM level 3 load/save APIs are in use.

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/*
 * 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;

/**
 *  DOMErrorHandler is a callback interface that the DOM 
 * implementation can call when reporting errors that happens while 
 * processing XML data, or when doing some other processing (e.g. validating 
 * a document). A DOMErrorHandler object can be attached to a 
 * Document using the "error-handler" on the 
 * DOMConfiguration interface. If more than one error needs to 
 * be reported during an operation, the sequence and numbers of the errors 
 * passed to the error handler are implementation dependent. 
 *  The application that is using the DOM implementation is expected to 
 * implement this interface. 
 * See also the Document Object Model (DOM) Level 3 Core Specification.
 * @since DOM Level 3
 */
public interface DOMErrorHandler {
    /**
     * This method is called on the error handler when an error occurs.
     * 
 If an exception is thrown from this method, it is considered to be 
     * equivalent of returning true. 
     * @param error  The error object that describes the error. This object 
     *   may be reused by the DOM implementation across multiple calls to 
     *   the handleError method. 
     * @return  If the handleError method returns 
     *   false, the DOM implementation should stop the current 
     *   processing when possible. If the method returns true, 
     *   the processing may continue depending on 
     *   DOMError.severity. 
     */
    public boolean handleError(DOMError error);

}