https://xerces.apache.org/xerces2-j/: 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. 
/*
 * 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.xerces.impl.dtd;

import org.apache.xerces.impl.Constants;
import org.apache.xerces.impl.XML11DTDScannerImpl;
import org.apache.xerces.impl.XMLDTDScannerImpl;
import org.apache.xerces.impl.XMLEntityManager;
import org.apache.xerces.impl.XMLErrorReporter;
import org.apache.xerces.util.SymbolTable;
import org.apache.xerces.util.XML11Char;
import org.apache.xerces.xni.grammars.XMLGrammarPool;
import org.apache.xerces.xni.parser.XMLEntityResolver;


This class extends XMLDTDProcessor by giving it
the ability to parse XML 1.1 documents correctly.  It can also be used
as a DTD loader, so that XML 1.1 external subsets can
be processed correctly (hence it's rather anomalous-appearing
derivation from XMLDTDLoader).

Author:Neil Graham, IBM
@xerces.internal
Version:$Id: XML11DTDProcessor.java 446755 2006-09-15 21:56:27Z mrglavas $
/**
 * This class extends XMLDTDProcessor by giving it
 * the ability to parse XML 1.1 documents correctly.  It can also be used
 * as a DTD loader, so that XML 1.1 external subsets can
 * be processed correctly (hence it's rather anomalous-appearing
 * derivation from XMLDTDLoader).
 * 
 * @xerces.internal

 *
 * @author Neil Graham, IBM
 *
 * @version $Id: XML11DTDProcessor.java 446755 2006-09-15 21:56:27Z mrglavas $
 */
public class XML11DTDProcessor extends XMLDTDLoader{

    // constructors

    public XML11DTDProcessor() {
        super();
    } // <init>()

    public XML11DTDProcessor(SymbolTable symbolTable) {
        super(symbolTable);
    } // init(SymbolTable)

    public XML11DTDProcessor(SymbolTable symbolTable,
                XMLGrammarPool grammarPool) {
        super(symbolTable, grammarPool);
    } // init(SymbolTable, XMLGrammarPool)

    XML11DTDProcessor(SymbolTable symbolTable,
                XMLGrammarPool grammarPool, XMLErrorReporter errorReporter, 
                XMLEntityResolver entityResolver) {
        super(symbolTable, grammarPool, errorReporter, entityResolver);
    } // init(SymbolTable, XMLGrammarPool, XMLErrorReporter, XMLEntityResolver)

    // overridden methods

    protected boolean isValidNmtoken(String nmtoken) {
        return XML11Char.isXML11ValidNmtoken(nmtoken);
    } // isValidNmtoken(String):  boolean
    
    protected boolean isValidName(String name) {
        return XML11Char.isXML11ValidName(name);
    } // isValidNmtoken(String):  boolean
    
    protected XMLDTDScannerImpl createDTDScanner(SymbolTable symbolTable,
            XMLErrorReporter errorReporter, XMLEntityManager entityManager) {
        return new XML11DTDScannerImpl(symbolTable, errorReporter, entityManager);
    } // createDTDScanner(SymbolTable, XMLErrorReporter, XMLEntityManager) : XMLDTDScannerImpl
    
    protected short getScannerVersion() {
        return Constants.XML_VERSION_1_1;
    } // getScannerVersion() : short
    
} // class XML11DTDProcessor