I'm trying to persist some data in a tree-like fashion (just like
folders on a hard-disc). I just wonder, if there is any
best-practice/pattern on doing this? Any hints?

I already found this nice paper
http://research.calacademy.org/taf/p...llew/index.htm on
storing tree data tree-like and fetching it again with a single query.
This works perfectly well, when used inside some POJO, but I wonder if
there is a better way using EJB.

Regards,
Alexander