Prepositions, Not Verbs or Nouns by David C. Hay
David Hay presents his opposing view to the assertions of other data modeling experts.

Review of The Decision Model: A Business Logic Framework Linking Business and Technology by David C. Hay
David Hay reviews The Decision Model: A Business Logic Framework for Linking Business and Technology, by Barbara von Halle and Larry Goldberg.

UML as a Data Modeling Notation, Part 4 by David C. Hay, Michael J. Lynott
This article, Part 4 of what was originally a 3-part series, is in response to some issues that were brought up after the first three articles of this series were published.

UML as a Data Modeling Notation, Part 3 by David C. Hay, Michael J. Lynott
Aesthetics
This article, Part 3 of a three-part series, discusses the aesthetics of preparing and presenting data models – no matter what notation is used.

UML as a Data Modeling Notation, Part 2 by David C. Hay, Michael J. Lynott
The Details
This article, Part 2 of a three-part series, addresses sub-types, domains and unique identifiers, as well as what in UML should not be used in a data model.

UML as a Data Modeling Notation, Part 1 by David C. Hay, Michael J. Lynott
Two Modeling Worlds
Part 1 of this three-part series describes the basic differences between notations and how they can be reconciled.

Data Structure: Data Modeling or XML? by David C. Hay
XML is a perfectly good vehicle for describing data to be transmitted from one place to another. It is not so good for describing the semantics – the nature of – the underlying data. It cannot replace data modeling and sound database design.

Data Modeling, RDF, & OWL - Part Three: Converting Data Model Relationships to OWL by David C. Hay

Data Modeling, RDF, & OWL - Part Two: Converting Data Model Entity Classes and Attributes to OWL by David C. Hay

Data Modeling, RDF, & OWL - Part One: An Introduction To Ontologies by David C. Hay

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