Okay, I got my simple Jaxb-Intros example to work by modifying the schema in the following fashion: I changed the schema from the original: <?xml version="1.0" encoding="UTF-8"?> | <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" attributeFormDefault="unqualified"> | <xs:element name="UnitPrice"> | <xs:complexType> | <xs:attribute name="value" type="xs:double" use="required"/> | </xs:complexType> | </xs:element> | </xs:schema> to <?xml version="1.0" encoding="UTF-8"?> | <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" attributeFormDefault="unqualified"> | <xs:element name="UnitPrice"> | | <xs:complexType> | <xs:sequence> | <xs:element name="value" type="xs:decimal" maxOccurs="1" minOccurs="0"/> | </xs:sequence> | </xs:complexType> | | </xs:element> | | </xs:schema> the XML file to be unmarshalled is now: <?xml version="1.0" encoding="UTF-8"?> | <UnitPrice xsi:noNamespaceSchemaLocation="C:\UnitPriceNew.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> | <value>40.0</value> | </UnitPrice> | The working jaxb-intros config file now looks like this: <?xml version = "1.0" encoding = "UTF-8"?> | <jaxb-intros xmlns="http://www.jboss.org/xsd/jaxb/intros"> | <Class name="junit.prices.UnitPrice"> | <XmlType name = "UnitPrice"/> | <Field name="value"> | <XmlElement name="value" /> | </Field> | </Class> | </jaxb-intros> | Again, thanks for your suggestions and thanks for Jaxb-intros. Regards, Sylvia View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4073405#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...