The main web site for Enhydra is www.enhydra.org. Enhydra 4.x, also known as Enhydra Enterprise, is at enterprise.enhydra.org, and there is also some information about the DODS Project at dods.enhydra.org.
An excellent introduction to Enhydra was written by ArsDigita corporation's Roger Metcalf and is available at
arsdigita.com/asj/enhydra.
A good (but slightly outdated) tutorial on using Enhydra, DODS and PostgreSQL is at
enhydra.enhydra.org/software/documentation/NewApp-DODS-Tutorial-PGSQL.html.
Here are two other good web pages about DODS and the QueryBuilder: dods.enhydra.org/software/documentation/gettingStarted.html
and
dods.enhydra.org/project/faq/UsingTheGeneratedCode.html
Thanks very much to the people at Lutris, and particularly David Young, for being helpful and informative about DODS. They deserve an especially big thank you for putting up with more than a week of craziness with Federal Express and the Israeli customs office, who refused to believe that software can indeed be free.