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 <h1 class="topictitle1">Validating XML files</h1>


 <div><p>When you validate your XML file, the XML validator will check to
 see that your file is valid and well-formed.</p>

 <div class="section"><p>The XML editor will process XML files that are invalid or not
 well-formed. The editor uses heuristics to open a file using the best interpretation
 of the tagging that it can. For example, an element with a missing end tag
 is simply assumed to end at the end of the document. As you make updates to
 a file, the editor incrementally reinterprets your document, changing the
 highlighting, tree view, and so on. Many formation errors are easy to spot
 in the syntax highlighting, so you can easily correct obvious errors on-the-fly.
 However, there will be other cases when it will be beneficial to perform formal
 validation on your documents.</p>
 <p>You can validate your file by selecting
 it in the Navigator view, right-clicking it, and clicking <span class="uicontrol">Validate</span>.
 Any validation problems are indicated in the Problems view. You can double-click
 on individual errors, and you will be taken to the invalid tag in the file,
 so that you can make corrections.</p>
 </div>

 <div class="section"><div class="note"><span class="notetitle">Note:</span>  If you receive an error message indicating that the Problems
 view is full, you can increase the number of error messages allowed by clicking <span class="menucascade">
 <span class="uicontrol">Window</span> &gt; <span class="uicontrol">Preferences</span></span> and
 selecting <span class="menucascade"><span class="uicontrol">General</span> &gt; <span class="uicontrol">Markers</span>
 </span>. Select the <span class="uicontrol">Use marker limits</span> check
 box and change the number in the <span class="uicontrol">Limit visible items per group</span> field.</div>
 <p>You
 can set up a project's properties so that different types of project resources
 are automatically validated when you save them. From a project's pop-up menu,
 click <span class="uicontrol">Properties</span>, then select <span class="uicontrol">Validation</span>.
 Any validators you can run against your project will be listed in the Validation
 page.</p>
 </div>

 </div>

 <div><div class="relconcepts"><strong>Related concepts</strong><br />
 <div><a href="../topics/cwxmledt.html" title="The XML editor is a tool for creating and viewing XML files.">XML editor</a></div>
 </div>
 <div class="relinfo"><strong>Related information</strong><br />
 <div><a href="../../org.eclipse.jst.j2ee.doc.user/topics/tjval.html">Validating code in enterprise applications</a></div>
 </div>
 </div>

 </body>
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	<head>
	<meta content="text/html; charset=utf-8" http-equiv="Content-Type" />
	<meta name="copyright" content="Copyright (c) 2000, 2008 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="Validating XML files" />
	<meta name="abstract" content="When you validate your XML file, the XML validator will check to see that your file is valid and well-formed." />
	<meta name="description" content="When you validate your XML file, the XML validator will check to see that your file is valid and well-formed." />
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	<title>Validating XML files</title>
	</head>
	<body id="twxvalid"><a name="twxvalid"><!-- --></a>


	<h1 class="topictitle1">Validating XML files</h1>




	<div><p>When you validate your XML file, the XML validator will check to
	see that your file is valid and well-formed.</p>

	<div class="section"><p>The XML editor will process XML files that are invalid or not
	well-formed. The editor uses heuristics to open a file using the best interpretation
	of the tagging that it can. For example, an element with a missing end tag
	is simply assumed to end at the end of the document. As you make updates to
	a file, the editor incrementally reinterprets your document, changing the
	highlighting, tree view, and so on. Many formation errors are easy to spot
	in the syntax highlighting, so you can easily correct obvious errors on-the-fly.
	However, there will be other cases when it will be beneficial to perform formal
	validation on your documents.</p>
	<p>You can validate your file by selecting
	it in the Navigator view, right-clicking it, and clicking <span class="uicontrol">Validate</span>.
	Any validation problems are indicated in the Problems view. You can double-click
	on individual errors, and you will be taken to the invalid tag in the file,
	so that you can make corrections.</p>
	</div>

	<div class="section"><div class="note"><span class="notetitle">Note:</span> If you receive an error message indicating that the Problems
	view is full, you can increase the number of error messages allowed by clicking <span class="menucascade">
	<span class="uicontrol">Window</span> > <span class="uicontrol">Preferences</span></span> and
	selecting <span class="menucascade"><span class="uicontrol">General</span> > <span class="uicontrol">Markers</span>
	</span>. Select the <span class="uicontrol">Use marker limits</span> check
	box and change the number in the <span class="uicontrol">Limit visible items per group</span> field.</div>
	<p>You
	can set up a project's properties so that different types of project resources
	are automatically validated when you save them. From a project's pop-up menu,
	click <span class="uicontrol">Properties</span>, then select <span class="uicontrol">Validation</span>.
	Any validators you can run against your project will be listed in the Validation
	page.</p>
	</div>

	</div>

	<div><div class="relconcepts"><strong>Related concepts</strong><br />
	<div><a href="../topics/cwxmledt.html" title="The XML editor is a tool for creating and viewing XML files.">XML editor</a></div>
	</div>
	<div class="relinfo"><strong>Related information</strong><br />
	<div><a href="../../org.eclipse.jst.j2ee.doc.user/topics/tjval.html">Validating code in enterprise applications</a></div>
	</div>
	</div>

	</body>
	</html>