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/*
 * Copyright (c) 1997, 2022 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Distribution License v. 1.0, which is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

package com.sun.xml.ws.security.policy;
import java.util.Iterator;

/**
 * Used to specify the header elements that the message MUST contain.
 *
 * {@code
 *  
 *      <sp:RequiredElements XPathVersion="xs:anyURI"? ... >
 *          <sp:XPath>xs:string</sp:XPath>+
 *              ...
 *      </sp:RequiredElements>
 *  
 * }
 * @author [email protected]
 */
public interface RequiredElements extends Target {

    /**
     * Returns XPath Version in use.
     * @return xpath version
     */
    String getXPathVersion();

     /**
     * targets header elements message must contains .
     * @return {@link java.util.Iterator }
     */
     Iterator getTargets();

}