Re: UB-Tree

On Fri, 2002-03-08 at 20:48, Robert Schrem wrote:
> 
> If not, you can download several PDF documents describing
> the UB-Tree related algorythms from this URL (in english 
> language!):
> 
> http://mistral.in.tum.de

The last one tere seems to be the original explanation of the idea.
> I found no free implementation of the UB-Tree. The team
> of R. Bayer only released closed source and sell it.

This technique seems to be a good candidate for implementing using GiST
or perhaps just defined using the <. operator mentioned there. 

Mappign from ordinary query with several = , < and between may be a
little tricky though.

They may also have patents on it, so we should move carefully here.

-------------
Hannu