contrib/tree

Don,

does your approach handle directed graphs ( DAG ) ?
Actually our module is just a result of our research for new
data type which could handle DAGs ( yahoo, dmoz -like hierarchies)
effectively in PostgreSQL.
While we didn't find a solution we decided to release this module
because 64 children would quite ok for many people.
Of course, 128 would be better :-)

How about 'move' operation in your approach ?
Regards,    Oleg
_____________________________________________________________
Oleg Bartunov, sci.researcher, hostmaster of AstroNet,
Sternberg Astronomical Institute, Moscow University (Russia)
Internet: oleg@sai.msu.su, http://www.sai.msu.su/~megera/
phone: +007(095)939-16-83, +007(095)939-23-83