David C. Hay www.essentialstrategies.com

DAVID C. HAY has pioneered in the use of process and data models to support strategic planning, requirements analysis, and system design since the late 1970s. In 1993, Dave founded the Houston-based consulting firm Essential Strategies, and, through it, developed enterprise models for many industries, including pharmaceutical research, oil refining and production, film and television, and nuclear energy. His work has been instrumental in identifying the fundamental structure of metadata and has helped hundreds of practitioners address issues of semantics in organization.

Using the relatively simple structures hidden in apparently complex situations, Dave developed the basis for Data Model Patterns: Conventions of Thought. A subsequent work, Data Model Patterns: A Metadata Map, provides comprehensive views of both business and technical metadata; a third work, Enterprise Model Patterns: Describing the World, is a sequel to Data Model Patterns and describes and extensively models more-complex patterns.

An internationally revered speaker at conferences on data management, modeling, and semantics, Dave is also author of Requirements Analysis: From Business Views to Architecture, a comprehensive review of requirements analysis techniques. He lives in Houston with his wife, Jola, and, in increasingly rare spare time, pursues the ancient Japanese art of Origami, folding square pieces of paper into flowers, dinosaurs, or any of myriad other figures -- without cutting, pasting, or swearing. He can be reached at dch@essentialstrategies.com.

DATA MODEL PATTERNS: Conventions of Thought *Now in softcover, at a lower price* ISBN: 978-0-932633-74-3 ©1996    288 pages    softcover   $36.95 (plus shipping)