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


 <div><p>Validating an XML schema determines whether the current state of
 the XML schema file is semantically valid. Any errors will be displayed in
 the Problems view.</p>

 <div class="section"><p>The following instructions were written for the Resource perspective,
 but they will also work in many other perspectives.</p>
 <p>To validate an XML
 schema, complete the following steps:</p>
 </div>

 <ol>
 <li class="stepexpand"><span>Right-click your file in the Navigator view and click <span class="uicontrol">Validate</span>.</span>
 </li>

 <li class="stepexpand"><span> If validation was not successful, you can refer to the Problems
 view to see what problems were logged. </span>  <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>

 </li>

 </ol>

 <div class="section"><p>The XML schema support in the XML schema editor is based on the
 W3C XML Schema Recommendation Specification. The XML Schema specifications
 XML Schema Part 1: Structures and XML Schema Part 2: Datatypes from the W3C
 Web site are used for validation.</p>
 <p>Certain error messages contain a reference
 to the schema constraints listed in Appendix C of the XML Schema Part 1: Structures
 document. Each constraint has a unique name that will be referenced in the
 error message. For example, if you receive an error message with this text: <tt class="sysout">ct-props-correct</tt> and
 you searched in the Structure document for the text, you would find that it
 is for the section "Schema Component Constraint: Complex Type Definition Properties
 Correct". </p>
 <p>You can set up a project's properties so that different types
 of project resources are automatically validated when you save them (this
 is set for all resources by default). From a project's pop-up
 menu select <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="reltasks"><strong>Related tasks</strong><br />
 <div><a href="../topics/tcxmlsch.html" title="You can create an XML schema and then edit it using the XML schema editor. Using the XML schema editor, you can specify element names that indicates which elements are allowed in an XML file, and in which combinations.">Creating XML schemas</a></div>
 </div>
 <div class="relinfo"><strong>Related information</strong><br />
 <div><a href="../../org.eclipse.jst.j2ee.doc.user/topics/tjval.html" title="General validation information">Validating code in enterprise applications</a></div>
 <div><a href="http://www.w3.org/TR/xmlschema-1" target="_blank" title="See the W3C Web site for more information on XML Schema specifications">XML
 Schema Part 1: Structures</a></div>
 <div><a href="http://www.w3.org/TR/xmlschema-2" target="_blank" title="See the W3C Web site for more information on XML Schema specifications">XML
 Schema Part 2: Datatypes</a></div>
 </div>
 </div>

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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 schemas" />
	<meta name="abstract" content="Validating an XML schema determines whether the current state of the XML schema file is semantically valid. Any errors will be displayed in the Problems view." />
	<meta name="description" content="Validating an XML schema determines whether the current state of the XML schema file is semantically valid. Any errors will be displayed in the Problems view." />
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	<meta content="XML schema files, validating" name="keywords" />
	<meta scheme="URI" name="DC.Relation" content="../topics/tcxmlsch.html" />
	<meta scheme="URI" name="DC.Relation" content="../../org.eclipse.jst.j2ee.doc.user/topics/tjval.html" />
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	<title>Validating XML schemas</title>
	</head>
	<body id="tvdtschm"><a name="tvdtschm"><!-- --></a>


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




	<div><p>Validating an XML schema determines whether the current state of
	the XML schema file is semantically valid. Any errors will be displayed in
	the Problems view.</p>

	<div class="section"><p>The following instructions were written for the Resource perspective,
	but they will also work in many other perspectives.</p>
	<p>To validate an XML
	schema, complete the following steps:</p>
	</div>

	<ol>
	<li class="stepexpand"><span>Right-click your file in the Navigator view and click <span class="uicontrol">Validate</span>.</span>
	</li>

	<li class="stepexpand"><span> If validation was not successful, you can refer to the Problems
	view to see what problems were logged. </span> <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>

	</li>

	</ol>

	<div class="section"><p>The XML schema support in the XML schema editor is based on the
	W3C XML Schema Recommendation Specification. The XML Schema specifications
	XML Schema Part 1: Structures and XML Schema Part 2: Datatypes from the W3C
	Web site are used for validation.</p>
	<p>Certain error messages contain a reference
	to the schema constraints listed in Appendix C of the XML Schema Part 1: Structures
	document. Each constraint has a unique name that will be referenced in the
	error message. For example, if you receive an error message with this text: <tt class="sysout">ct-props-correct</tt> and
	you searched in the Structure document for the text, you would find that it
	is for the section "Schema Component Constraint: Complex Type Definition Properties
	Correct". </p>
	<p>You can set up a project's properties so that different types
	of project resources are automatically validated when you save them (this
	is set for all resources by default). From a project's pop-up
	menu select <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="reltasks"><strong>Related tasks</strong><br />
	<div><a href="../topics/tcxmlsch.html" title="You can create an XML schema and then edit it using the XML schema editor. Using the XML schema editor, you can specify element names that indicates which elements are allowed in an XML file, and in which combinations.">Creating XML schemas</a></div>
	</div>
	<div class="relinfo"><strong>Related information</strong><br />
	<div><a href="../../org.eclipse.jst.j2ee.doc.user/topics/tjval.html" title="General validation information">Validating code in enterprise applications</a></div>
	<div><a href="http://www.w3.org/TR/xmlschema-1" target="_blank" title="See the W3C Web site for more information on XML Schema specifications">XML
	Schema Part 1: Structures</a></div>
	<div><a href="http://www.w3.org/TR/xmlschema-2" target="_blank" title="See the W3C Web site for more information on XML Schema specifications">XML
	Schema Part 2: Datatypes</a></div>
	</div>
	</div>

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