de a basic mapping or
 id mapping defined by the mapped superclass or embeddable class
 (or embeddable class of one of its attributes).

 <p> May be applied to an element collection containing instances
 of an embeddable class or to a map collection whose key and/or
 value is an embeddable class. When <code>AttributeOverride</code> is
 applied to a map, "<code>key.</code>" or "<code>value.</code>" must be used
 to prefix the name of the attribute that is being overridden in
 order to specify it as part of t