This book represents an important industry consensus on component technology for database products and languages, which enables wide acceptance and adoption of object database technology. ODMG-93, the Object Database Standard, is the result of several years' work in defining a standard for object database management systems, including both data model and language standards. Each author is a technical representative of the Object Database Management Group (ODMG), a consortium of object-oriented database companies whose goals is to establish agreement for object-oriented database technology industry-wide.