Description Paul Fullbright 2011-06-03 17:37:05 EDT

From the JAXB 2.2 spec (8.9.10.2)

- At most one field or a property in a class can be annotated with @XmlValue.
- @XmlValue can be used with the following annotations:
    - @XmlList - however this is redundant since @XmlList maps a type to a schema simple type that derives by list just as @XmlValue would.
    - @XmlJavaTypeAdapter
- If the type of the field or property is a collection type, then the collection item type must map to a simple schema type. Examples:
// Examples (not exhaustive): Legal usage of @XmlValue
@XmlValue List<Integer> foo; // int maps to xs:int
@XmlValue String[] foo; // String maps to xs:string
@XmlValue List<Bar> foo; // only if Bar maps to a simple
// schema type
- If the type of the field or property is not a collection type, then the type
of the property or field must map to a schema simple type.
- The containing class must not extend another class (other than
java.lang.Obect).

Also: 
- The java type containing the @XmlValue must map to a type with text content.
- If the java attribute type is a collection type, then the schema type must be a list simple type  [ More investigation needed here ]