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 <title>Updating XML files with changes made to DTDs and schemas</title>
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 <body id="tedtgram"><a name="tedtgram"><!-- --></a>


 <h1 class="topictitle1">Updating XML files with changes made to DTDs and schemas</h1>


 <div><p>If you make changes to a DTD file or XML schema associated with
 an XML file (that is currently open), click <span class="uicontrol">XML &gt; Reload Dependencies</span> to
 update the XML file with these changes. The changes will be reflected in the
 guided editing mechanisms available in the editor, such as content assist.</p>

 <div class="section"><p>For example, you have a DTD file called "Contact.dtd" and an XML
 file called "Contact.xml" associated with it. Contact.dtd contains a root
 element called  <span class="uicontrol">Contact</span> that can contain any of the
 following children elements:  <span class="uicontrol">Name</span>,  <span class="uicontrol">PostalAddress</span>,
  <span class="uicontrol">Email</span>. If you remove the child element  <span class="uicontrol">Email</span> from
 the DTD, you will no longer be able to add an  <span class="uicontrol">Email</span> child
 element to your root element Contact in your Contact.xml file. This change,
 however, will not come into effect until you save your changes in the DTD
 and click <span class="uicontrol">XML &gt; Reload Dependencies</span> in the XML editor.
 Until you click it, you will still be able to add <span class="uicontrol">Email</span> elements
 to Contact.xml.</p>
 <p>This feature is very handy when you are making updates
 to both DTDs and XML schemas and XML files that are associated with DTDs and
 XML schemas.</p>
 </div>

 </div>

 <div><div class="relconcepts"><strong>Related concepts</strong><br />
 <div><a href="../topics/cxmlcat.html" title="When an XML file is associated with a DTD or XML schema, it is bound by any structural rules contained in the DTD or XML schema. To be considered a valid XML file, a document must be accompanied by a DTD or an XML schema, and conform to all of the declarations in the DTD or the XML schema.">XML file associations with DTDs and XML schemas</a></div>
 </div>
 <div class="reltasks"><strong>Related tasks</strong><br />
 <div><a href="../topics/tedtcnst.html" title="In the Design view, when you edit an XML file that has a set of constraints (that is, a set of rules) defined by a DTD or an XML schema, you can turn the constraints on and off to provide flexibility in the way you edit, but still maintain the validity of the document periodically.">Editing with DTD or XML schema constraints</a></div>
 <div><a href="../topics/tedtdoc.html" title="The DOCTYPE declaration in an XML file is used at the beginning of it to associate it with a DTD file. You can edit your DOCTYPE declaration to change the DTD file your XML file is associated with.">Editing DOCTYPE declarations</a></div>
 <div><a href="../topics/txmlcat.html" title="An XML Catalog entry contains two parts - a Key (which represents a DTD or XML schema) and a Uniform Resource Identifier (URI) (which contains information about a DTD or XML schema's location). You can place the Key in an XML file. When the XML processor encounters it, it will use the XML Catalog entry to find the location of the DTD or XML schema associated with the Key">Adding entries to the XML Catalog</a></div>
 <div><a href="../topics/tedtsch.html" title="Your namespace information is used to provide various information about the XML file, such as the XML schema and namespace it is associated with. If desired, you can change the schema and namespace your XML file is associated with or add a new association. Modifying any associations can impact what content is allowed in the XML file.">Editing namespace information</a></div>
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	<head>
	<meta content="text/html; charset=utf-8" http-equiv="Content-Type" />
	<meta name="copyright" content="Copyright (c) 2000, 2006 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" />
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	<meta content="task" name="DC.Type" />
	<meta name="DC.Title" content="Updating XML files with changes made to DTDs and schemas" />
	<meta name="abstract" content="If you make changes to a DTD file or XML schema associated with an XML file (that is currently open), click XML > Reload Dependencies to update the XML file with these changes. The changes will be reflected in the guided editing mechanisms available in the editor, such as content assist." />
	<meta name="description" content="If you make changes to a DTD file or XML schema associated with an XML file (that is currently open), click XML > Reload Dependencies to update the XML file with these changes. The changes will be reflected in the guided editing mechanisms available in the editor, such as content assist." />
	<meta content="XML editor, updating, XML files with associated changes, XML files, updating with associated changes" name="DC.subject" />
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	<meta content="en-us" name="DC.Language" />
	<link href="../../org.eclipse.wst.doc.user/common.css" type="text/css" rel="stylesheet" />
	<title>Updating XML files with changes made to DTDs and schemas</title>
	</head>
	<body id="tedtgram"><a name="tedtgram"><!-- --></a>


	<h1 class="topictitle1">Updating XML files with changes made to DTDs and schemas</h1>




	<div><p>If you make changes to a DTD file or XML schema associated with
	an XML file (that is currently open), click <span class="uicontrol">XML > Reload Dependencies</span> to
	update the XML file with these changes. The changes will be reflected in the
	guided editing mechanisms available in the editor, such as content assist.</p>

	<div class="section"><p>For example, you have a DTD file called "Contact.dtd" and an XML
	file called "Contact.xml" associated with it. Contact.dtd contains a root
	element called <span class="uicontrol">Contact</span> that can contain any of the
	following children elements: <span class="uicontrol">Name</span>, <span class="uicontrol">PostalAddress</span>,
	<span class="uicontrol">Email</span>. If you remove the child element <span class="uicontrol">Email</span> from
	the DTD, you will no longer be able to add an <span class="uicontrol">Email</span> child
	element to your root element Contact in your Contact.xml file. This change,
	however, will not come into effect until you save your changes in the DTD
	and click <span class="uicontrol">XML > Reload Dependencies</span> in the XML editor.
	Until you click it, you will still be able to add <span class="uicontrol">Email</span> elements
	to Contact.xml.</p>
	<p>This feature is very handy when you are making updates
	to both DTDs and XML schemas and XML files that are associated with DTDs and
	XML schemas.</p>
	</div>

	</div>

	<div><div class="relconcepts"><strong>Related concepts</strong><br />
	<div><a href="../topics/cxmlcat.html" title="When an XML file is associated with a DTD or XML schema, it is bound by any structural rules contained in the DTD or XML schema. To be considered a valid XML file, a document must be accompanied by a DTD or an XML schema, and conform to all of the declarations in the DTD or the XML schema.">XML file associations with DTDs and XML schemas</a></div>
	</div>
	<div class="reltasks"><strong>Related tasks</strong><br />
	<div><a href="../topics/tedtcnst.html" title="In the Design view, when you edit an XML file that has a set of constraints (that is, a set of rules) defined by a DTD or an XML schema, you can turn the constraints on and off to provide flexibility in the way you edit, but still maintain the validity of the document periodically.">Editing with DTD or XML schema constraints</a></div>
	<div><a href="../topics/tedtdoc.html" title="The DOCTYPE declaration in an XML file is used at the beginning of it to associate it with a DTD file. You can edit your DOCTYPE declaration to change the DTD file your XML file is associated with.">Editing DOCTYPE declarations</a></div>
	<div><a href="../topics/txmlcat.html" title="An XML Catalog entry contains two parts - a Key (which represents a DTD or XML schema) and a Uniform Resource Identifier (URI) (which contains information about a DTD or XML schema's location). You can place the Key in an XML file. When the XML processor encounters it, it will use the XML Catalog entry to find the location of the DTD or XML schema associated with the Key">Adding entries to the XML Catalog</a></div>
	<div><a href="../topics/tedtsch.html" title="Your namespace information is used to provide various information about the XML file, such as the XML schema and namespace it is associated with. If desired, you can change the schema and namespace your XML file is associated with or add a new association. Modifying any associations can impact what content is allowed in the XML file.">Editing namespace information</a></div>
	</div>
	</div>

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