Essential Strategies, Inc. is a consulting firm specializing in helping companies use information architecture
to enable them to take advantage of the latest technologies, plan their information systems, analyze requirements, and make systems a reality.
Essential Strategies, Inc. is expert at producing data models (object models) and process models
as part of strategic planning, requirements planning, and data warehouse projects.
Articles Modeling Baseball Cards: A Case Study 
Modeling the data on baseball cards turns out to be an excellent exercise of data modeling skills. This article describes the development of a data model as the modeler achieves successive insights into the subtleties of the underlying data. Beginning with a simple model of baseball cards themselves, the model will be extended in stages, until it becomes one that can serve as the basis for a true database to capture each player's performance throughout his career.
This will be an example of the way to develop a data model.
Semantics and Ontologies:
Data Modeling, RDF and OWL
(Part One: An Introduction to Ontologies)
This first article introduces the subjects of semantics and ontologies from the perspective of the data modeler. A conceptual data modeler has been creating semantic models and ontologies for many years, but this is the opportunity to link what he knows with bodies of knowledge developed independently by linguists and artificial intelligence specialists.
(Part Two: Converting Data Model Entity Classes and Attributes to OWL)
This article shows an example of the first steps in converting a data model to the web ontology language, OWL Specifically, it is concerned with defining entity classes (classes) and attributes (datatype properties). The next issue will cover relationships.
(Part Three: Converting Data Model Entity Classes and Attributes to OWL)
This article completes the job begun by the two above by addressing relationships (object properties).
"What Exactly Is a Data Model?", DM Review, February-April, 2003.
A three-part series defining and clarifying the different kinds of data models that are being produced today. This article is about data models and the "Business owner's view" of the enterprise.
(DM Review does not permit direct links to its web site, but you can go directly to the links shown below.)
Privacy Issues
With the "War on Terrorism" in full swing, Americans must be more vigilent than ever to defend against government infringments upon our civil rights--especially the right to privacy. Go here to see links to organizations at the forefront of that defense.
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