bsddb3 vs zodb

[Gregory P. Smith]

>     Greg> for automated "secondary indexing" which really gives it a
>     Greg> significant chunk of capabilities that people often end up using
>     Greg> for full fledged relational databases for. 
> 
> Can you explain what "secondary indexing" is?  I was never aware I needed it
> and am using relational databases because of it. ;-)

Sleepcat does the best job of describing it:

http://www.sleepycat.com/docs/ref/am/second.html

Anyone using an SQL or Relational database would take it granted, but that
many people desiring a tiny low level embeddable database (BerkeleyDB)
should now be very happy.

-G