I was going to post my own code, but it looks like the CPAN module listed in my <a href="http://del.icio.us">del.icio.us</a> nestedset page is a better place. It's a DBIx implementation. This is the module I looked at before. I remembered it wrong. This module does do the nested set using a relational database. At the time, I didn't want to spend much time using a DBIx framework. Also, I thought that DBIx was deprecated. On second review, it appears to be worth while.
<br><br><br clear="all"><a href="http://del.icio.us/mlehmann/nestedset">http://del.icio.us/mlehmann/nestedset</a><br><br>-- <br>Mark Lehmann<br>512 689-7705 M