Fensel, Dieter. Ontologies: A Silver Bullet for Knowledge Management and Electronic Commerce. Berlin: Springer-Verlag, 2001. Brief but informative.

Economic Classification Policy Committee. 8-Feb-93. Aggregation Structures and Hierarchies Issues. Paper No. 2. Web article: http://www.census.gov/epcd/naics/issues2. Motivation for shifting from SIC to NAICS codes.

Gruber, Tom. 9-Oct-01. What Is an Ontology? Web article: http://www.ksl.stanford.edu/kst/what-is-an-ontology.htm. Classic article on ontologies.

Heflin, Jeff. Fall 2001. The Semantic Web Syllabus. Web article: http://www.cse.lehigh.edu/~heflin/courses/se-fall01/.

Heflin, Jeff. 4-Oct-00. General Ontology (Draft). Web article: http://www.cs.umd.edu/projects/plus/SHOE/onts/commerce1.0.html. SHOE.

Heflin, Jeff. 28-Apr-00. Commerce Ontology (Draft). Web article: http://www.cs.umd.edu/projets/plus/SHOE/onts/commerce1.0.html. SHOE.

Hever, Boo. 5-Oct-02. Testing Vocabulary. Web article: http://www.forumeducation.net/servelet/pages/vi/mat/vocarticle.htm.

Hillmann, Diane. 14-Jun-01. Using Dublin Core. Web article: http://dublincore.org/documents/usageguide/. SHOE.

Jeflin, Jeff, et al. 7-Mar-02. Requirements for a Web Ontology Language. Web article: http://www.w3.org/TR/2002/WD-webont-reg-20020307/.

Kingston, John. 1-Sep-02. Ontologies, Multi-Perspective Modeling and Knowledge Auditing Information Research Report. Web article: http://www.informatics.ed.ac.uk/publications/report/0053.html.

Lagoze, Carl. 1-Jan-01. Keeping Dublin Core Simple. D-Lib Magazine 7( 1), Jan 2001. Available at http://www.dlib.org/dlib/january01/lagoze/01lagoze.html. Dublin Core is a widely used ontology for authored documents.

Luke, Sean. 6-Dec-01. Adding Semantic Knowledge to an HTML Page Using SHOE. Web article: http://www.cs.umd.edu/projects/plus/SHOE/html-pages.html. SHOE is an early ontology language.

McGuinness, Deborah L. 14-18-Aug-01. Conceptual Modeling for Distributed Ontology Environments. Web article: http://www.ontology.org/main/papers/iccs-dlm.html.

Noy, Natalya F., McGuinness, Deborah L. 3-Jul-02. Ontology Development...