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/*
 * The contents of this file are subject to the terms 
 * of the Common Development and Distribution License 
 * (the "License").  You may not use this file except 
 * in compliance with the License.
 * 
 * You can obtain a copy of the license at 
 * glassfish/bootstrap/legal/CDDLv1.0.txt or 
 * https://glassfish.dev.java.net/public/CDDLv1.0.html. 
 * See the License for the specific language governing 
 * permissions and limitations under the License.
 * 
 * When distributing Covered Code, include this CDDL 
 * HEADER in each file and include the License file at 
 * glassfish/bootstrap/legal/CDDLv1.0.txt.  If applicable, 
 * add the following below this CDDL HEADER, with the 
 * fields enclosed by brackets "[]" replaced with your 
 * own identifying information: Portions Copyright [yyyy] 
 * [name of copyright owner]
 */
// Copyright (c) 1998, 2007, Oracle. All rights reserved.  
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();
}