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 <title>Adding redefine elements</title>
 </head>
 <body id="taddrdfn"><a name="taddrdfn"><!-- --></a>

 <h1 class="topictitle1">Adding redefine elements</h1>
 <div>
 	<div class="skipspace">
 		<div>
 			<div>
 				You can use the <samp class="codeph">redefine</samp> mechanism
 				to redefine simple and complex types, groups, and attribute
 				groups obtained from external schema files. When you redefine a
 				component, you are modifying its contents.<p>Like the
 				<samp class="codeph">include</samp> mechanism,
 				<samp class="codeph">redefine</samp> requires the external
 				components to be in the same target namespace as the redefining
 				schema, although external components from schemas that have no
 				namespace can also be redefined.</div>
 		</div>
 		<p>The following instructions were written for the Resource perspective,
 		but they will also work in many other perspectives.</p>
 <p>To
 add a redefine element, follow these steps:</p>
 </div>
 <ol><li class="skipspace"><span>Open your XML schema in the XML schema editor.</span></li>
 <li class="skipspace"><span>In the Outline view, select your schema.</span> The entire
 schema and its contents should be displayed in the Graph view.</li>
 <li class="skipspace"><span>In the Graph view, right-click in the <b>Directives</b> section
 and click <span class="uicontrol">Add Redefine</span>.</span></li>
 <li class="skipspace"><span>In the Properties view, click the <b>General</b> tab and click
 the <b> <span class="uicontrol">More</span></b> button
 <img border="0" src="../images/More.gif" width="22" height="18"> to the right of the
 <b> <span class="uicontrol">Schema
 location</span> </b>field.</span> The XML schema file you select must
 have the same namespace as the current schema.</li>
 <li class="skipspace"><span>If you want to select an XML schema located in the workbench, select
 the <b> <span class="uicontrol">Workbench projects</span> </b>radio button and click <span class="uicontrol">
 <b>Next</b>.</span></span><ol type="a"><li><span> Select the schema you want to include and click
 	<b> <span class="uicontrol">Finish</span></b>.</span></li>
 </ol>
 </li>
 <li class="skipspace"><span>If you want to select an XML schema located on the Web, select
 the <b> <span class="uicontrol">HTTP</span></b> radio button and click <b> <span class="uicontrol">Next</span></b>.</span><ol type="a"><li><span>Type the URL of the XML schema and click
 	<b> <span class="uicontrol">Finish</span></b>.
  </span></li>
 </ol>
   <div class="note"><span class="notetitle"><b>Note</b>: </span>A local copy of the schema will not be stored in the workbench.
 Every time you validate your schema, the schema's contents will be checked
 from the URL you specify.</div>
 </li>
 <li class="skipspace"><span>The XML schema editor will retrieve the location of the included
 XML schema file and display it as read-only in the  <b>  <span class="uicontrol">Schema location</span>
 </b>field.</span></li>
 <li class="skipspace"><span>Click the <b> <span class="uicontrol">Documentation</span></b> tab if you want
 to provide any information about this redefine element.</span> The <span class="uicontrol">Documentation</span> page is used for human readable
 material, such as a description, and the <span class="uicontrol">App Info</span>
 page can be used to provide information for applications.</li>
 </ol>
 <div class="skipspace"><p>Once you have added the redefine element to your XML
 	schema, you can redefine any of the simple and complex types, groups, and
 	attribute groups in the XML schema you selected in the redefine element. </p>
 </div>
 </div>

 <div><p><b class="reltaskshd">Related tasks</b><br />
 <a href="../topics/taddimpt.html" title="As schemas become larger, it is often desirable to divide their content among several schema documents for purposes such as ease of maintenance, reuse, and readability. XML schema defines two constructs to support this: include and import. The include element brings in definitions and declarations from the included schema into the current schema. It requires the included schema to be in the same target namespace as the including schema. The import element behaves in a similar way, with the exception that the imported schema can come from a different namespace.">Adding an import element</a><br />
 <a href="../topics/taddincl.html" title="As schemas become larger, it is often desirable to divide their content among several schema documents for purposes such as ease of maintenance, reuse, and readability. XML schema defines two constructs to support this: include and import. The include element brings in definitions and declarations from the included schema into the current schema. It requires the included schema to be in the same target namespace as the including schema. The import element behaves in a similar way, with the exception that the imported schema can come from a different namespace.">Adding an include element</a><br />
 </p>
 <p><b class="relrefhd">Related reference</b><br />
 <a href="../topics/rnmspc.html" title="">XML namespaces</a><br />
 </p>
 </div>
 </body>
 </html>
	<?xml version="1.0" encoding="UTF-8"?>
	<!DOCTYPE html
	PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
	<html>
	<head>
	<!-- /*******************************************************************************
	* Copyright (c) 2000, 2005 IBM Corporation and others.
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/epl-v10.html
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/ -->
	<link rel="stylesheet" type="text/css" href="../../org.eclipse.wst.doc.user/common.css" />
	<title>Adding redefine elements</title>
	</head>
	<body id="taddrdfn"><a name="taddrdfn"><!-- --></a>

	<h1 class="topictitle1">Adding redefine elements</h1>
	<div>
	<div class="skipspace">
	<div>
	<div>
	You can use the <samp class="codeph">redefine</samp> mechanism
	to redefine simple and complex types, groups, and attribute
	groups obtained from external schema files. When you redefine a
	component, you are modifying its contents.<p>Like the
	<samp class="codeph">include</samp> mechanism,
	<samp class="codeph">redefine</samp> requires the external
	components to be in the same target namespace as the redefining
	schema, although external components from schemas that have no
	namespace can also be redefined.</div>
	</div>
	<p>The following instructions were written for the Resource perspective,
	but they will also work in many other perspectives.</p>
	<p>To
	add a redefine element, follow these steps:</p>
	</div>
	<ol><li class="skipspace"><span>Open your XML schema in the XML schema editor.</span></li>
	<li class="skipspace"><span>In the Outline view, select your schema.</span> The entire
	schema and its contents should be displayed in the Graph view.</li>
	<li class="skipspace"><span>In the Graph view, right-click in the <b>Directives</b> section
	and click <span class="uicontrol">Add Redefine</span>.</span></li>
	<li class="skipspace"><span>In the Properties view, click the <b>General</b> tab and click
	the <b> <span class="uicontrol">More</span></b> button
	<img border="0" src="../images/More.gif" width="22" height="18"> to the right of the
	<b> <span class="uicontrol">Schema
	location</span> </b>field.</span> The XML schema file you select must
	have the same namespace as the current schema.</li>
	<li class="skipspace"><span>If you want to select an XML schema located in the workbench, select
	the <b> <span class="uicontrol">Workbench projects</span> </b>radio button and click <span class="uicontrol">
	<b>Next</b>.</span></span><ol type="a"><li><span> Select the schema you want to include and click
	<b> <span class="uicontrol">Finish</span></b>.</span></li>
	</ol>
	</li>
	<li class="skipspace"><span>If you want to select an XML schema located on the Web, select
	the <b> <span class="uicontrol">HTTP</span></b> radio button and click <b> <span class="uicontrol">Next</span></b>.</span><ol type="a"><li><span>Type the URL of the XML schema and click
	<b> <span class="uicontrol">Finish</span></b>.
	</span></li>
	</ol>
	<div class="note"><span class="notetitle"><b>Note</b>: </span>A local copy of the schema will not be stored in the workbench.
	Every time you validate your schema, the schema's contents will be checked
	from the URL you specify.</div>
	</li>
	<li class="skipspace"><span>The XML schema editor will retrieve the location of the included
	XML schema file and display it as read-only in the <b> <span class="uicontrol">Schema location</span>
	</b>field.</span></li>
	<li class="skipspace"><span>Click the <b> <span class="uicontrol">Documentation</span></b> tab if you want
	to provide any information about this redefine element.</span> The <span class="uicontrol">Documentation</span> page is used for human readable
	material, such as a description, and the <span class="uicontrol">App Info</span>
	page can be used to provide information for applications.</li>
	</ol>
	<div class="skipspace"><p>Once you have added the redefine element to your XML
	schema, you can redefine any of the simple and complex types, groups, and
	attribute groups in the XML schema you selected in the redefine element. </p>
	</div>
	</div>

	<div><p><b class="reltaskshd">Related tasks</b><br />
	<a href="../topics/taddimpt.html" title="As schemas become larger, it is often desirable to divide their content among several schema documents for purposes such as ease of maintenance, reuse, and readability. XML schema defines two constructs to support this: include and import. The include element brings in definitions and declarations from the included schema into the current schema. It requires the included schema to be in the same target namespace as the including schema. The import element behaves in a similar way, with the exception that the imported schema can come from a different namespace.">Adding an import element</a><br />
	<a href="../topics/taddincl.html" title="As schemas become larger, it is often desirable to divide their content among several schema documents for purposes such as ease of maintenance, reuse, and readability. XML schema defines two constructs to support this: include and import. The include element brings in definitions and declarations from the included schema into the current schema. It requires the included schema to be in the same target namespace as the including schema. The import element behaves in a similar way, with the exception that the imported schema can come from a different namespace.">Adding an include element</a><br />
	</p>
	<p><b class="relrefhd">Related reference</b><br />
	<a href="../topics/rnmspc.html" title="">XML namespaces</a><br />
	</p>
	</div>
	</body>
	</html>