Hi to All!
I have an answer for this question.
I look to new JSR-317 (JPA 2.0) and found this:
Expanded object/relational mapping functionality, including greater flexibility in combining existing mapping options, support for collections of embedded objects, [b]multiple levels of[/b] embedded objects, [b]ordered lists[/b], combinations of access types, etc.
For JPA 1.0 it's impossible.
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