The testcase is CollectionWithValues. (remove the modification then you'll see it fail) Its not a javabean its a real collection and it doesn't have "items" it has an add() operation. :-) | @XmlType() | @JBossXmlNoElements | @JBossXmlChildren | ({ | @JBossXmlChild(name="array", type=AbstractArrayMetaData.class), | @JBossXmlChild(name="collection", type=AbstractCollectionMetaData.class), | @JBossXmlChild(name="inject", type=AbstractDependencyValueMetaData.class), | @JBossXmlChild(name="list", type=AbstractListMetaData.class), | @JBossXmlChild(name="map", type=AbstractMapMetaData.class), | @JBossXmlChild(name="null", type=AbstractValueMetaData.class), | @JBossXmlChild(name="set", type=AbstractSetMetaData.class), | @JBossXmlChild(name="this", type=ThisValueMetaData.class), | @JBossXmlChild(name="value", type=StringValueMetaData.class) | }) | @JBossXmlChildWildcard(wrapper=AbstractValueMetaData.class, property="value") | public class AbstractCollectionMetaData extends AbstractTypeMetaData | implements Collection<MetaDataVisitorNode>, Serializable | If you think it is confusing then we could condition it on @JBossXMLNoElements or something that identifies it for this usecase? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4134568#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...