jaxb XmlAccessType: PROPERTY example

Question

I'm trying to use jaxb and want to use the 'XmlAccessType.PROPERTY' to let jaxb use getters/setters rather than variable directly, but get different errors depending on what I try, or the variable isn't set at all like I want.

Any good link or pointer to a simple example?

For example, the below makes the groupDefintion not to be set when parsing the xml document:

@XmlAccessorType(javax.xml.bind.annotation.XmlAccessType.PROPERTY)
public class E {
    private EGroup groupDefinition;

    public EGroup getGroupDefinition () {
        return groupDefinition;
    }
    @XmlAttribute
    public void setGroupDefinition (EGroup g) {
        groupDefinition = g;
    }
}