Contrarian articles by Fabian Pascal about the necessity of getting the relational model properly implemented.

Concentrating on the 12 Rules from EF Codd and a succinct, informal definition of normalisation with examples.

Additional material related to the book.

Paper by C.J. Date on business rules as data integrity constraints.

Series of relational database model articles by Chris J Date, with emphasis on rules applications. Registration required.

Articles by Christopher J Date about how the relational model can fulfill all OO needs. Web-only articles from DBPD that never made to print.

Articles by Christohper J Date with emphasis on foundations. Web published by DBPD after the print magazine folded.

Several short, insightful articles on the relevance of the Relational Model to enterprise application integration.