Hugh Darwen

Darwen
Hugh Darwen is a computer scientist who was an employee of IBM United Kingdom from 1967 to 2004, and has been involved in the history of the relational model.wikipedia
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Relational model

relationalrelational data modelrelationships
Hugh Darwen is a computer scientist who was an employee of IBM United Kingdom from 1967 to 2004, and has been involved in the history of the relational model. From 1978 to 1982 he was a chief architect on Business System 12, a database management system that faithfully embraced the principles of the relational model.
There have been several attempts to produce a true implementation of the relational database model as originally defined by Codd and explained by Date, Darwen and others, but none have been popular successes so far.

The Third Manifesto

Darwen is the author of The Askew Wall and co-author of The Third Manifesto, a proposal for serving object-oriented programs with purely relational databases without compromising either side and getting the best of both worlds, arguably even better than with so-called object-oriented databases.
The Third Manifesto (1995) is Christopher J. Date's and Hugh Darwen's proposal for future database management systems, a response to two earlier Manifestos with the same purpose.

Relational database

relational database management systemRDBMSrelational databases
Darwen is the author of The Askew Wall and co-author of The Third Manifesto, a proposal for serving object-oriented programs with purely relational databases without compromising either side and getting the best of both worlds, arguably even better than with so-called object-oriented databases. From 2004 to 2013 he lectured on relational databases at the Department of Computer Science, University of Warwick (UK), and from 1989 to 2014 was a tutor and consultant for the Open University (UK) where he was awarded a MUniv honorary degree for academic and scholarly distinction.
A second school of thought argues that if a database does not implement all of Codd's rules (or the current understanding on the relational model, as expressed by Christopher J. Date, Hugh Darwen and others), it is not relational.

Christopher J. Date

Chris DateC. J. DateC.J. Date
He works closely with Christopher J. Date and represented IBM at the ISO SQL committees (JTC1 SC32 WG3 Database languages, WG4 SQL/MM ) until his retirement from IBM.
He left IBM in 1983 and has written extensively of the relational model, in association with Hugh Darwen.

D (data language specification)

Tutorial DD
He currently teaches a database language designed by Chris Date and himself called Tutorial D.
D is a set of prescriptions for what Christopher J. Date and Hugh Darwen believe a relational database management system ought to be like.

SQL

Structured Query LanguageSQL databaseSQL Databases
He works closely with Christopher J. Date and represented IBM at the ISO SQL committees (JTC1 SC32 WG3 Database languages, WG4 SQL/MM ) until his retirement from IBM.

IBM

International Business MachinesIBM CorporationInternational Business Machines Corporation
Hugh Darwen is a computer scientist who was an employee of IBM United Kingdom from 1967 to 2004, and has been involved in the history of the relational model. He works closely with Christopher J. Date and represented IBM at the ISO SQL committees (JTC1 SC32 WG3 Database languages, WG4 SQL/MM ) until his retirement from IBM.

IBM Business System 12

Business System 12
From 1978 to 1982 he was a chief architect on Business System 12, a database management system that faithfully embraced the principles of the relational model.

Database

database management systemdatabasesDBMS
From 1978 to 1982 he was a chief architect on Business System 12, a database management system that faithfully embraced the principles of the relational model.

International Organization for Standardization

ISOISO standardInternational Organisation for Standardisation
He works closely with Christopher J. Date and represented IBM at the ISO SQL committees (JTC1 SC32 WG3 Database languages, WG4 SQL/MM ) until his retirement from IBM.

Object-oriented programming

object-orientedobject orientedobject-oriented programming language
Darwen is the author of The Askew Wall and co-author of The Third Manifesto, a proposal for serving object-oriented programs with purely relational databases without compromising either side and getting the best of both worlds, arguably even better than with so-called object-oriented databases.

Object database

object-oriented databaseobject-oriented databasesobject persistence
Darwen is the author of The Askew Wall and co-author of The Third Manifesto, a proposal for serving object-oriented programs with purely relational databases without compromising either side and getting the best of both worlds, arguably even better than with so-called object-oriented databases.

University of Warwick

Warwick UniversityWarwickThe University of Warwick
From 2004 to 2013 he lectured on relational databases at the Department of Computer Science, University of Warwick (UK), and from 1989 to 2014 was a tutor and consultant for the Open University (UK) where he was awarded a MUniv honorary degree for academic and scholarly distinction.

Open University

The Open UniversityOpen University Business SchoolOpen
From 2004 to 2013 he lectured on relational databases at the Department of Computer Science, University of Warwick (UK), and from 1989 to 2014 was a tutor and consultant for the Open University (UK) where he was awarded a MUniv honorary degree for academic and scholarly distinction.

British degree abbreviations

B.Litt.BLittdegree abbreviations
From 2004 to 2013 he lectured on relational databases at the Department of Computer Science, University of Warwick (UK), and from 1989 to 2014 was a tutor and consultant for the Open University (UK) where he was awarded a MUniv honorary degree for academic and scholarly distinction.

University of Wolverhampton

Wolverhampton PolytechnicWolverhampton UniversityWolverhampton College of Art
He was also awarded a DTech (Doctor in Technology) honorary degree by the University of Wolverhampton.

Contract bridge

bridgebridge playerBridge game
He has written a book on the card game bridge and has a website on the subject of.

Alan Truscott

Alan Truscott has called him "the world's leading authority" on composed bridge problems.

Bridge Magazine

BridgeBridge Plus
He was responsible for the double dummy column in Bridge Magazine from 1965 to 1990.

Warwick

Warwick, EnglandWarwick, Warwickshirea city of the same name

Dataphor

D4 (programming language)D4Alphora Dataphor
Dataphor's D4 language is based on the principles of Christopher J Date's and Hugh Darwen's Tutorial D, but with a Pascal-like imperative syntax.

Relvar

Base relvarrelation variablerelvars
In relational databases, relvar is a term introduced by C. J. Date and Hugh Darwen as an abbreviation for relation variable in their 1995 paper The Third Manifesto, to avoid the confusion sometimes arising from the use of the term relation, by the inventor of the relational model, E. F. Codd, for a variable to which a relation is assigned as well as for the relation itself.

Rel (DBMS)

Rel
Rel is an open-source true relational database management system that implements a significant portion of Chris Date and Hugh Darwen's Tutorial D query language.