object database

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object database

A database that is managed by an object-oriented database management system (ODBMS). Object databases are closely aligned with a particular object-oriented programming language and enable the data in the objects to be persistently stored without requiring conversion to a relational database (see O-R mapping). A fair amount of tedious code is eliminated, and the object data are stored much faster.

Complex Structures
Object databases are also suited for applications that are not necessarily based on an object model, but use a large number of in-memory indexes that are difficult to store in a relational database. Object databases may be used for real-time applications whereby they can extend memory beyond the operating system's own virtual memory limit.

Object Vs. Relational
Examples of object-oriented databases are ObjectStore (www.ignitetech.com) and Versant Object Database (www.versant.com). Relational databases have also added object-oriented features; for example, UniSQL was one of the first products to support both structures. See universal server, ODMG and object-oriented programming.

Structural Flexibility
While relational databases easily provide one-to-many and many-to-one relationships, object databases allow for many-to-many relationships. Information systems that require complex relationships can store their data in an object database with greater ease than a relational database.

Object Modeling
When information systems are modeled as objects, they can employ the powerful inheritance capability. Instead of building a table of employees with department and job information in separate tables, the type of employee is modeled. The employee class contains the data and the processing for all employees. Each subclass (manager, secretary, etc.) contains the data and processing unique to that person's job. Changes can be made globally or individually by modifying the class in question.
References in periodicals archive ?
Object databases are perfectly suited for storing data from objects that have hierarchical and recursive structures, and/or deep inheritance hierarchies.
According to Hogan, object databases are ideal to handle XML data since they handle objects in their native forms and can manage XML's hierarchical tree navigation and rich linking.
a provider of distributed, scalable object databases and ObjectShare Inc.
Roberto Zicari of Frankfurt University, the program's goal is to promote and further the use of object databases -- by offering free resources for students, faculty and researchers at universities and research centers, as well as for JAVA and .
Barry's Web site, covering a wide range of topics including Web services, XML standards, application servers, database concepts and standards, object-relational mapping and object databases.
is the leading provider of high performance object databases that manage and analyze complex information and relationships as well as very large volumes of data for mission-critical, real-time applications.
is the leading provider of high performance, scalable object databases with unrivaled support for mixed-language development and distributed, mixed-hardware environments.
is the leading provider of high-performance, scalable object databases with unrivaled support for mixed-language development and distributed, mixed-hardware environments.
Despite the fact that the TRW developers had no experience with object databases, the process of storing persistent objects was very natural and almost transparent to the programmers.
in association with the University of Wales, Cardiff What: Objectivity and Cardiff jointly announce the Workshop on High Performances Object Databases to bring together a multidisciplinary group to investigate the use of object databases in large-scale applications.