Fabian Pascal
Recently I participated in a LinkedIn exchange initiated by the following statement: “First-Order Predicate Logic is quietly breaking enterprise semantics. FOPL assumes meaning can be expressed as predicates applied to entities: subject → predicate → object That works beautifully in...
Fabian Pascal
Chris Date once published an article at the old DBDebunk titled “Models, Models, Everywhere, Nor Any Time to Think”. If you want to get a hold of what he meant then, you oughta do a search on the title now and see what you get. The continuous proliferation of models is an indication and measure...
Fabian Pascal
In "Codd Almighty! Has it been half a century of SQL already?" the Register's Lindsay Clark interviews "Donald Chamberlin, Michael Stonebraker and more" about the legendary programming [sic] language. Chamberlin with Raymond Boyce were the authors of "the 1974 paper SEQUEL: A structured English...
Fabian Pascal
I am working on entirely new papers (not re-writes) in the PRACTICAL DATABASE FOUNDATIONS series. I have already published two:THE FIRST NORMAL FORM - A DEFINITIVE GUIDEPRIMARY KEYS - A NEW UNDERSTANDINGavailable for ordering from the PAPERS page, and two more:RELATIONAL DATABASE DOMAINS: A...
Fabian Pascal
In Part 1 we introduced in the conceptual model (CM) the metalogical designation property. It represents—in the absence of known shared defining properties of an entity type, the designation by a group's definer that an entity identifier (aka assigned name) or property value is a member of the...