Thanks for the response and the very useful debugging suggestions. I ended up getting the UnitPrice class implementation below to work in example to work in JAXB-proper. without the @XmlTransient tag on getValue() I observed an illegal annotations error indicating that the attribute value and the method getValue() are somehow duplicating eachother as far as JAXB is concerned. Now, I am wondering whether XmlRootElement and XmlTransient are necessary annotations in JaxbIntros to make this sort of example work? @XmlRootElement(name="UnitPrice") | public class UnitPrice { | | @XmlAttribute private double value; | UnitPrice(double value){ | this.value=value; | } | UnitPrice() | { | | } | | @XmlTransient | public double getValue() | { | return this.value; | } | public void setValue(double v){ | this.value = v; | } | } | View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4073200#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...