05 May 2013Added a forthcoming presentation and, toappear laeter in 2013, a book, and a couple of videos.
02 APRIL 2013Updated Projects page to announce new version of DuroDBMS (formerly known as Duro).
11 FEBRUARY 2013Posted revision of TTM affecting RM Pre 1 and RM Pre 8. Removed Database Explorations from Books for Sale. In Documents and Books, revised entry for View Updating and Relational Theory, which was published in January.
08 FEBRUARY 2013
Belatedly posted the minor revision of Tutorial D that was made on October 30th, 2011. Copied the Inheritance Model to the Reference Material page.
15 November 2012In Papers, added The Relational Model by Hugh Darwen, intended for readers of the autumn 2012 issue of the IEEE Annals of The History of Computing.
09 november 2012
In Documents and Books, added HD's new book SQL: A Comparative Survey and an errata for Temporal Data and The Relational Model.