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JDK 1.6
  javax.xml.bind.annotation. XmlSchema View Javadoc
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/*
 * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */

package javax.xml.bind.annotation;

import java.lang.annotation.Retention;
import java.lang.annotation.Target;

import static java.lang.annotation.ElementType.*;
import static java.lang.annotation.RetentionPolicy.*;

/**
 * <p> Maps a package name to a XML namespace. </p>
 *
 * <p><b>Usage</b> </p>
 * <p>
 * The XmlSchema annotation can be used with the following program
 * elements:
 * <ul> 
 *   <li>package</li>
 * </ul>
 * 
 * This is a package level annotation and follows the recommendations
 * and restrictions contained in JSR 175, section III, "Annotations".
 * Thus the usage is subject to the following constraints and
 * recommendations.
 * <ul>
 *   <li> There can only be one package declaration as noted in JSR
 *        175, section III, "Annotations". </li>
 *   <li> JSR 175 recommends package-info.java for package level
 *        annotations. JAXB Providers that follow this recommendation
 *        will allow the package level annotations to be defined in
 *        package-info.java.
 * </ul>
 * <p>
 *
 * <p><b>Example 1:</b> Customize name of XML namespace to which 
 * package is mapped.</p>
 *
 * <pre>
 *    &#64;javax.xml.bind.annotation.XmlSchema (
 *      namespace = "http://www.example.com/MYPO1"
 *    )
 *    
 *    &lt;!-- XML Schema fragment -->
 *    &lt;schema
 *      xmlns=...
 *      xmlns:po=....
 *      targetNamespace="http://www.example.com/MYPO1"
 *    >
 *    &lt;!-- prefixes generated by default are implementation
 *            depedenent -->
 * </pre>
 *
 * <p><b>Example 2:</b> Customize namespace prefix, namespace URI
 * mapping</p>
 *
 * <pre>
 *    // Package level annotation
 *    &#64;javax.xml.bind.annotation.XmlSchema (
 *      xmlns = { 
 *        &#64;javax.xml.bind.annotation.XmlNs(prefix = "po", 
 *                   namespaceURI="http://www.example.com/myPO1"),
 *
 *        &#64;javax.xml.bind.annotation.XmlNs(prefix="xs",
 *                   namespaceURI="http://www.w3.org/2001/XMLSchema")
 *      )
 *    )
 * 
 *    &lt;!-- XML Schema fragment -->
 *    &lt;schema
 *        xmlns:xs="http://www.w3.org/2001/XMLSchema"
 *        xmlns:po="http://www.example.com/PO1"
 *        targetNamespace="http://www.example.com/PO1">
 * 
 * </pre>
 *
 * <p><b>Example 3:</b> Customize elementFormDefault</p>
 * <pre>
 *    &#64;javax.xml.bind.annotation.XmlSchema (
 *      elementFormDefault=XmlNsForm.UNQUALIFIED
 *      ...
 *    )
 * 
 *    &lt;!-- XML Schema fragment -->
 *    &lt;schema
 *        xmlns="http://www.w3.org/2001/XMLSchema"
 *        xmlns:po="http://www.example.com/PO1"
 *        elementFormDefault="unqualified">
 * 
 * </pre>

 * @author Sekhar Vajjhala, Sun Microsystems, Inc.
 * @since JAXB2.0
 * @version $Revision: 1.8 $
 */
@Retention(RUNTIME) @Target({PACKAGE})
public @interface XmlSchema {

    /**
     * Customize the namespace URI, prefix associations. By default,
     * the namespace prefixes for a XML namespace are generated by a
     * JAXB Provider in an implementation dependent way.
     */
    XmlNs[]  xmlns() default {};

    /**
     * Name of the XML namespace.
     */
    String namespace() default "";

    /**
     * Namespace qualification for elements. By default, element 
     * default attribute will be absent from the XML Schema fragment.
     */
    XmlNsForm elementFormDefault() default XmlNsForm.UNSET;

    /**
     * Namespace qualification for attributes. By default,
     * attributesFormDefault will be absent from the XML Schema fragment.
     */
    XmlNsForm attributeFormDefault() default XmlNsForm.UNSET;
}

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