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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 * 
 * // Copyright (c) 1998, 2007, Oracle. All rights reserved.
 * 
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License. You can obtain
 * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
 * or glassfish/bootstrap/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 * 
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
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 * as provided by Sun in the GPL Version 2 section of the License file that
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 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
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package oracle.toplink.essentials.platform.xml;


// JDK imports
import java.net.URL;

/**
 * A schema reference is used to access a schema in order to validate a
 * document.
 */
public interface XMLSchemaReference {
    public static final int COMPLEX_TYPE = 1;
    public static final int SIMPLE_TYPE = 2;
    public static final int ELEMENT = 3;
    public static final int GROUP = 5;

    /**
     * Returns the path to be traversed for validation purposes.
     *
     * @return a string represented the path to be traversed
     */
    public String getSchemaContext();

    /**
     * Indicates if the schema reference references a simple type definition,
     * complex type definition, element or group
     *
     * @return COMPLEX_TYPE=1, SIMPLE_TYPE=2, ELEMENT=3, GROUP=5
     */
    public int getType();

    /**
     * A URL which referenes the Schema.
     *
     * @return the schema URL
     */
    public URL getURL();
}