docs/org.eclipse.wst.dtdeditor.doc.user/topics/tchgelm.html - sourceediting/webtools.sourceediting - Git at Google

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 <h1 class="topictitle1">Editing an element's content model</h1>
 <div><p>An element's content model represents any data that can be contained
 inside or within the content of an element (that is, between the start and
 end tags of an element in an XML file). Editing an element's content model
 enables you to determine exactly what the element can (and cannot) contain.</p><div class="skipspace"><p>There are four kinds of content models: <i>element content</i>,
  <i>mixed content</i>, <i>EMPTY content</i> and <i>ANY content</i></p>
 <p>In
 the <i>element content</i> content model an element can only contain other
 child elements. In the <i>mixed content</i> content model, an element can
 contain both character data (text that is not parsed by the XML parser) and
 other child elements. In the <i>EMPTY content</i> content model, an element
 cannot contain any other elements or text. In the <i>ANY content</i> content
 model, the element can literally contain anything - other elements, in any
 number, and text.</p>
 <p>In the DTD editor, you can create elements with any
 of these content models. When you create an element in the DTD editor, a child
 element with an EMPTY content model is automatically created.</p>
 <p>The following
 instructions were written for the Resource perspective, but they will also
 work in many other perspectives. </p>
 <p>To edit an element's content
 model, follow these steps:</p>
 </div>
 <ol><li class="skipspace"><span>Open your DTD in the DTD editor.</span></li>
 <li class="skipspace"><span>In the Outline view, expand the parent element you want to work
 with.</span></li>
 <li class="skipspace"><span>Select the first child of the expanded parent element.</span> This
 is the element's content model.</li>
 <li class="skipspace"><span>In the Design view, you change its <span class="uicontrol">Content type</span> to</span><ul><li><span class="uicontrol">ANY</span></li>
 <li>(#PCDATA)</li>
 <li>Another element</li>
 <li><span class="uicontrol">Children Content</span> or  <span class="uicontrol">Mixed Content</span>.</li>
 </ul>
  Once you select either <span class="uicontrol">Children Content</span> or  <span class="uicontrol">Mixed
 Content</span> you will have a group (represented by a group node - <img src="../images/XSDSequence.gif" /> if you select  <span class="uicontrol">Children Content</span> and <img src="../images/XSDChoice.gif" /> if you select  <span class="uicontrol">Mixed Content</span>),
 which you can use to create a group of child elements under the parent element.
 A child element will automatically be created under the group node. For information
 on editing a group, refer to the related information.<p><b>Note</b>: If you
 intend to have mixed content, the value of the first element in your group
 must be (#PCDATA) (consequently, if you select <span class="uicontrol">Mixed Content</span>,
 two child elements will automatically be created, the first one having a value
 of (#PCDATA).</p>
   </li>
 <li class="skipspace"><span>If you do not want the parent element to contain anything, leave
 its <span class="uicontrol">Content type</span> as <span class="uicontrol">EMPTY</span>.</span></li>
 <li class="skipspace"><span>Select the appropriate <b>Occurrence</b> option to indicate how
 often the element can occur in an XML file.</span> This option is not
 available if you select ANY, (#PCDATA), EMPTY, or another element.</li>
 <li class="skipspace"><span>To add another existing element to a group as a child, right-click
 the group node, click <span class="uicontrol">Add Element to Content Model</span> and
 specify its name.</span></li>
 <li class="skipspace"><span>To add a group to the content model, right-click the group node
 and click <span class="uicontrol">Add Group to Content Model</span>.</span> For
 information on editing a group, refer to the link below.</li>
 </ol>
 <div class="skipspace"></div>
 </div>

 <div>
 <blockquote>
 <div class="ulchildlink"><b><a href="../topics/tedtgnde.html">Editing a group node</a></b><br />
 If your element has either element content or mixed content, its content model is represented by a group node. You can add children elements or another group to a group node, and specify how often, and in what manner a group of elements will be available in an XML file associated with your DTD.</div>
 </blockquote>

 <p>
 <b class="parentlink">Parent topic:</b> <a href="../topics/tcretelm.html" title="You can use element declarations in DTDs to define the elements that may occur in an XML document. Element declarations can specify that an element can contain other elements, that it can contain anything at all, or that it must be empty.">Creating elements</a><br />
 </p>
 </div>
 		<p>
 		(C) Copyright IBM Corporation 2000, 2005. All Rights Reserved.
 		</p>
 </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">
	<!-- /*******************************************************************************
	* 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
	*******************************************************************************/ -->
	<html>
	<head>
	<link rel="stylesheet" type="text/css" href="../../com.ibm.help.doc/swg_info_common.css" />
	<title>Editing an element's content model</title>
	<script language="JavaScript">
	function popup_window( url, id, width, height )
	{
	popup = window.open( url, id, 'toolbar=no,scrollbars=no,location=no,statusbar=no,menubar=no,resizable=no,width=' + width + ',height=' + height + ',left=,top=' );
	popup.focus();
	}
	</script><script language="JavaScript" src="help/liveHelp.js"></script></head>
	<body id="tchgelm"><a name="tchgelm"><!-- --></a>

	<h1 class="topictitle1">Editing an element's content model</h1>
	<div><p>An element's content model represents any data that can be contained
	inside or within the content of an element (that is, between the start and
	end tags of an element in an XML file). Editing an element's content model
	enables you to determine exactly what the element can (and cannot) contain.</p><div class="skipspace"><p>There are four kinds of content models: <i>element content</i>,
	<i>mixed content</i>, <i>EMPTY content</i> and <i>ANY content</i></p>
	<p>In
	the <i>element content</i> content model an element can only contain other
	child elements. In the <i>mixed content</i> content model, an element can
	contain both character data (text that is not parsed by the XML parser) and
	other child elements. In the <i>EMPTY content</i> content model, an element
	cannot contain any other elements or text. In the <i>ANY content</i> content
	model, the element can literally contain anything - other elements, in any
	number, and text.</p>
	<p>In the DTD editor, you can create elements with any
	of these content models. When you create an element in the DTD editor, a child
	element with an EMPTY content model is automatically created.</p>
	<p>The following
	instructions were written for the Resource perspective, but they will also
	work in many other perspectives. </p>
	<p>To edit an element's content
	model, follow these steps:</p>
	</div>
	<ol><li class="skipspace"><span>Open your DTD in the DTD editor.</span></li>
	<li class="skipspace"><span>In the Outline view, expand the parent element you want to work
	with.</span></li>
	<li class="skipspace"><span>Select the first child of the expanded parent element.</span> This
	is the element's content model.</li>
	<li class="skipspace"><span>In the Design view, you change its <span class="uicontrol">Content type</span> to</span><ul><li><span class="uicontrol">ANY</span></li>
	<li>(#PCDATA)</li>
	<li>Another element</li>
	<li><span class="uicontrol">Children Content</span> or <span class="uicontrol">Mixed Content</span>.</li>
	</ul>
	Once you select either <span class="uicontrol">Children Content</span> or <span class="uicontrol">Mixed
	Content</span> you will have a group (represented by a group node - <img src="../images/XSDSequence.gif" /> if you select <span class="uicontrol">Children Content</span> and <img src="../images/XSDChoice.gif" /> if you select <span class="uicontrol">Mixed Content</span>),
	which you can use to create a group of child elements under the parent element.
	A child element will automatically be created under the group node. For information
	on editing a group, refer to the related information.<p><b>Note</b>: If you
	intend to have mixed content, the value of the first element in your group
	must be (#PCDATA) (consequently, if you select <span class="uicontrol">Mixed Content</span>,
	two child elements will automatically be created, the first one having a value
	of (#PCDATA).</p>
	</li>
	<li class="skipspace"><span>If you do not want the parent element to contain anything, leave
	its <span class="uicontrol">Content type</span> as <span class="uicontrol">EMPTY</span>.</span></li>
	<li class="skipspace"><span>Select the appropriate <b>Occurrence</b> option to indicate how
	often the element can occur in an XML file.</span> This option is not
	available if you select ANY, (#PCDATA), EMPTY, or another element.</li>
	<li class="skipspace"><span>To add another existing element to a group as a child, right-click
	the group node, click <span class="uicontrol">Add Element to Content Model</span> and
	specify its name.</span></li>
	<li class="skipspace"><span>To add a group to the content model, right-click the group node
	and click <span class="uicontrol">Add Group to Content Model</span>.</span> For
	information on editing a group, refer to the link below.</li>
	</ol>
	<div class="skipspace"></div>
	</div>

	<div>
	<blockquote>
	<div class="ulchildlink"><b><a href="../topics/tedtgnde.html">Editing a group node</a></b><br />
	If your element has either element content or mixed content, its content model is represented by a group node. You can add children elements or another group to a group node, and specify how often, and in what manner a group of elements will be available in an XML file associated with your DTD.</div>
	</blockquote>

	<p>
	<b class="parentlink">Parent topic:</b> <a href="../topics/tcretelm.html" title="You can use element declarations in DTDs to define the elements that may occur in an XML document. Element declarations can specify that an element can contain other elements, that it can contain anything at all, or that it must be empty.">Creating elements</a><br />
	</p>
	</div>
	<p>
	(C) Copyright IBM Corporation 2000, 2005. All Rights Reserved.
	</p>
	</body>
	</html>