12 FEBRUARY 2024
Many thanks to Dave Voorhis (author of Rel, an implementation of Tutorial D) for taking ownership of the domain thethirdmanifesto.com. The website to which this domain is linked continues to be hosted by the Computer Science department of the University of Warwick, where I (Hugh Darwen) was a part-time lecturer from 2004 to 2013. Its url is https://www.dcs.warwick.ac.uk/~hugh/TTM. There are no plans to add further material as of the above date.12 August 2020
There are no longer any books for sale directly from the authors. I couldn't find a way of removing the link from the header, so I've just replaced the text in that page with an apology. HD.07 jUly 2020
In Tutorial D (see Reference Material) we deleted support for a WITH clause on statements and added it to various constructs having a commalist of assigns, such as <extend> and <relation update>.03 jUNE 2020
Corrected a bad BNF editng error in Tutorial D.06 january 2020
Added new book by Chris Date, Database Design and Relational Theory, to Documents and Books.26 august 2019
Added new book by Chris Date, E.F. Codd and Relational Theory, to Documents and Books.19 May 2019
Posted an improved copy of Two-digit solutions.xlsx in Beyond The Four Fours.10 May 2019
Corrected an error in Beyond The Four Fours.09 May 2019
Added "Beyond The Four Fours" to the Projects page.13 november 2018
Added link to new web-based discussion forum.20 june 2017
Added Feature Analysis of Business System 12 to the Papers section.10 MAY 2017
Added Tutorial D: Approved Variations to Reference Reference Material.28 September 2016
Added new version of the Inheritance Model to Reference Material.23 September 2016
Added C.J. Date's new book, Type Inheritance and Relational Theory, to Documents and Books.Updated Tutorial D definitions in Reference Material to support TUPLE{*} and IMAGE_IN(r,t).
22 JUNE 2016
Added Erik Olson's relational.js to the Projects page.05 April 2016
In Reference Material, published today's revisions of TTM and Tutorial D.26 March 2016
HD added a note to DBE Chapter 21 regarding definitions of subtypes of system-defined types.27 January 2016
C.J. Date's The New Relational Database Dictionary and various O'Reilly videos added to Documents and Books. Also deleted entries in RECENT UPDATES dated prior to 2015.20 January 2016
C.J. Date's free Ebook What is Database Design, Anyway? added to Documents and Books.15 november 2015
Further clarification added, in Documents and Books, regarding the definitve verion of TTM.13 november 2015
Third edition of Chris Date's SQL and Relational Theory added to the list of books.
11 september 2015
Updated the Events entry for the Oracle event on Johannesburg, October 5-9, 2015, which is now going to take place after all.02 september 2015
Added Hugh Darwen's "Why Are There No Relational DBMSs?" to the Papers section, along with three other papers related to the same issue.29 August 2015
Updated the Events entry for the Oracle event on Johannesburg, October 5-9, 2015.02 JuLY 2015
Added Adrian Walker's EE/IBL to the Projects page.18 June 2015
Updated the entry for DuroDBMS in the Projects page, announcing version 0.26.20 May 2015
Added David Bennett's Andl to the Projects page. Also reordered the list so that projects known to be currently active appear first. Also bookmarked each section and added a TOC.08 May 2015
In Events, updated the entry concerning Chris Date's presentations in South Africa, now being rescheduled for October 2015.06 March 2015
In Events, added Chris Date's forthcoming presentations at Oracle University Expert Summits.In Presentations, added five more O'Reilly videos by Chris Date.