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A slightly adapted version of Xerces 2.11.0 to allow the XMLStringBuffer responsible for XML attribute scanning to start larger and thus avoid extended appending times. The initial buffer size is controlled by settting the system property julielab.xerces.attributebuffersize (also available as constant XMLScanner#ATTRIBUTE_BUFFER_SIZE).

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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.xerces.xni.grammars;

import org.apache.xerces.xni.XMLResourceIdentifier;

/**
 *  This interface describes basic attributes of XML grammars--their
 * physical location and their type. 
 *
 * @author Neil Graham, IBM
 * @version $Id: XMLGrammarDescription.java 447245 2006-09-18 05:22:10Z mrglavas $
 */
public interface XMLGrammarDescription extends XMLResourceIdentifier {

    // initial set of grammar constants that some configurations will recognize;user
    // components which create and/or recognize other types of grammars may
    // certainly use their own constants in place of these (so long as
    // their Grammar objects implement this interface).

    /**
     * The grammar type constant for XML Schema grammars. When getGrammarType()
     * method returns this constant, the object should be an instance of
     * the XMLSchemaDescription interface.
     */
    public static final String XML_SCHEMA = "http://www.w3.org/2001/XMLSchema";
    
    /**
     * The grammar type constant for DTD grammars. When getGrammarType()
     * method returns this constant, the object should be an instance of
     * the XMLDTDDescription interface.
     */
    public static final String XML_DTD = "http://www.w3.org/TR/REC-xml";

    /**
     * Return the type of this grammar.
     * 
     * @return  the type of this grammar
     */
    public String getGrammarType();

} // interface XMLGrammarDescription