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Object-Oriented Database Management Systems - Online Term Papers

Object-Oriented Database Management Systems

The construction of started in
the middle 80's, at a prototype building level, and at the beginning of the
90's the first commercial systems appeared. The interest for the
development of such systems stems from the need to cover the modeling
deficiencies of their predecessors, that is the relational database
management systems. They were intended to be used by applications that have
to handle big and complex data such as Computer Aided Engineering, Computer
Aided Design, and Office Information Systems.

The area of the OODBMSs is characterized by three things. First, it lacks a
common data model. There is no common data model although many proposals
can be found in the literature. This ...

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or under development today share a set of
fundamental object-oriented concepts. Therefore the implementation issues
in OODBMSs that arise due to these concepts are universal. The third
characteristic is that of experimental activity. Plenty of prototypes have
been implemented and some of them became commercial products. There is
really a need for applications to handle very complex data and that is why
the interest of people in building such systems is so strong.

Although there is no consensus on what an OODBMS is and which are the
features that differentiate it from other systems, there has been a lot of
effort for an agreement on defining the formal characteristics that can
stand as the set of specification requirements for the construction of such
a system. These should also be used as the set of features that one has to
check in order to find out if a system is really an OODBMS. The features of
the OODBMS can be divided as follows:

* mandatory features: these are ...

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tuple, etc. The minimal set of constructors that a system must have
is: set (to represent unordered collections of real world objects), list
(to represent ordered collections of real world objects), tuple (to
represent properties of real world objects). A system that supports
composite objects and therefore constructors for their building, should
also support operators for the retrieval, insertion, and deletion of their
component objects. That means that the database language should be extended
in a way that these operators will be included.

The identity of an object is what makes it different from all the other
objects. This allows the objects to be independent of their ...

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Object-Oriented Database Management Systems. (2004, February 3). Retrieved January 1, 2026, from http://www.essayworld.com/essays/Object-Oriented-Database-Management-Systems/2460

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PAPER DETAILS

Added: 2/3/2004 05:33:19 AM
Category: Computers
Type: Premium Paper
Words: 3198
Pages: 12

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