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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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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.html.dom;
    

import org.apache.xerces.dom.DOMImplementationImpl;
import org.w3c.dom.DOMException;
import org.w3c.dom.html.HTMLDOMImplementation;
import org.w3c.dom.html.HTMLDocument;


/**
 * Provides number of methods for performing operations that are independent
 * of any particular instance of the document object model. This class is
 * unconstructable, the only way to obtain an instance of a DOM implementation
 * is by calling the static method {@link #getDOMImplementation}.
 * 
 * @xerces.internal
 * 
 * @version $Revision: 645327 $ $Date: 2008-04-07 04:47:54 +0530 (Mon, 07 Apr 2008) $
 * @author Assaf Arkin
 * @see org.w3c.dom.DOMImplementation
 */
public class HTMLDOMImplementationImpl
    extends DOMImplementationImpl
    implements HTMLDOMImplementation
{


    /**
     * Holds a reference to the single instance of the DOM implementation.
     * Only one instance is required since this class is multiple entry.
     */
    private static final HTMLDOMImplementation _instance = new HTMLDOMImplementationImpl();


    /**
     * Private constructor assures that an object of this class cannot
     * be created. The only way to obtain an object is by calling {@link
     * #getDOMImplementation}.
     */
    private HTMLDOMImplementationImpl()
    {
    }


    /**
     * Create a new HTML document of the specified TITLE text.
     *
     * @param title The document title text
     * @return New HTML document
     */
    public final HTMLDocument createHTMLDocument( String title )
        throws DOMException
    {
	HTMLDocument doc;

	if ( title == null )
	    throw new NullPointerException( "HTM014 Argument 'title' is null." );
	doc = new HTMLDocumentImpl();
	doc.setTitle( title );
	return doc;
    }


    /**
     * Returns an instance of a {@link HTMLDOMImplementation} that can be
     * used to perform operations that are not specific to a particular
     * document instance, e.g. to create a new document.
     *
     * @return Reference to a valid DOM implementation
     */
    public static HTMLDOMImplementation getHTMLDOMImplementation()
    {
	return _instance;
    }


}