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    <p>When I run your example I get the same thing. The error message is correct <code>unexpected element (uri:"", local:"artist")</code> the element exists in the XML but you have not mapped to it. The expected elements you have mapped to are <code>&lt;{}id&gt;,&lt;{}released&gt;,&lt;{}name&gt;,&lt;{}availability&gt;</code> the element <code>&lt;{}artist&gt;</code> does not appear there because you have excluded it with <code>@XmlTransient</code>.</p> <pre><code>DefaultValidationEventHandler: [ERROR]: unexpected element (uri:"", local:"artist"). Expected elements are &lt;{}id&gt;,&lt;{}released&gt;,&lt;{}name&gt;,&lt;{}availability&gt; Location: line 6 of file:/Users/bdoughan/GIT/EclipseLink-Trunk3/Scratch/src/dao/spotify/test5.xml javax.xml.bind.UnmarshalException: unexpected element (uri:"", local:"artist"). Expected elements are &lt;{}id&gt;,&lt;{}released&gt;,&lt;{}name&gt;,&lt;{}availability&gt; at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallingContext.handleEvent(UnmarshallingContext.java:642) </code></pre> <p>Note about <code>DefaultValidationEventHandler</code>. This class represents the default validation event rules for JAXB 1.0 which are different from JAXB 2.0. The following is from the Javadoc (see: <a href="http://docs.oracle.com/javase/7/docs/api/javax/xml/bind/helpers/DefaultValidationEventHandler.html" rel="nofollow">http://docs.oracle.com/javase/7/docs/api/javax/xml/bind/helpers/DefaultValidationEventHandler.html</a>)</p> <blockquote> <p>JAXB 1.0 only default validation event handler. This is the default handler for all objects created from a JAXBContext that is managing schema-derived code generated by a JAXB 1.0 binding compiler.</p> <p>This handler causes the unmarshal and validate operations to fail on the first error or fatal error.</p> <p>This handler is not the default handler for JAXB mapped classes following JAXB 2.0 or later versions. Default validation event handling has changed and is specified in Unmarshaller and Marshaller.</p> </blockquote> <p>If you had not specified this as the <code>ValidationEventHandler</code> then your document would have unmarshalled correctly.</p> <hr> <h2>UPDATE</h2> <blockquote> <p>I'm afraid I don't understand; I thought that I had mapped artist when specifying: private LookupInnerArtist artist;? When changing the DefaultValidationEventHandler to ValidationEventCollector (correct?) everything works fine, even if I have specified artist as @XmlTransient. </p> </blockquote> <p>Since you have specified <code>@XmlAccessorType(XmlAccessType.FIELD)</code> all fields except those annotated with <code>@XmlTransient</code> will be considered mapped.</p> <blockquote> <p>I can still see artist when debugging, though it has a null value.</p> </blockquote> <p>Even though <code>artist</code> is annotated with <code>@XmlTransient</code> it still remains available on your class. Since it is now considered unmapped it will not be populated by the unmarshal operation.</p> <p><strong>For More Information</strong></p> <ul> <li><a href="http://blog.bdoughan.com/2012/04/jaxb-and-unmapped-properties.html" rel="nofollow">http://blog.bdoughan.com/2012/04/jaxb-and-unmapped-properties.html</a></li> </ul>
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    1. COI'm afraid I don't understand; I thought that I had mapped artist when specifying: `private LookupInnerArtist artist;`? When changing the `DefaultValidationEventHandler` to `ValidationEventCollector` (correct?) everything works fine, even if I have specified `artist` as `@XmlTransient`. I can still see `artist` when debugging, though it has a null value.
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    2. CO@nivis - I have updated my answer to provide some additional information.
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    3. COThanks for the clarification and for taking your time answering my question!
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