Object-Oriented Database Management Systems Essay

Object-Oriented Database Management Systems The construction of Object-Oriented Database Management Systems started in the middle 80s, at a prototype building level, and at the beginning of the 90s 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†¦show more content†¦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 the features that one system should have in order to deserve the title OODBMS. †¢ optional features: these are the features that if one system has, should be considered better than another that does not have them, provided that both have all the mandatory features. †¢ open choices: these are features that a designer of a system can choose if and how to implement. They represent the degrees of freedom left to the system designers. An OODBMS should be a database management system and at the same time an object oriented system. The first characteristic is translated to the following features: persistence, concurrency, recovery, secondary storage management, and ad hoc query mechanisms. The second characteristic is translated to the following: composite objects, object-identity, encapsulation, inheritance overriding and late binding, extensibility, and computational completeness of the database language used. Composite objects can be built recursively from simpler ones by applying constructors to them. These simpler objects can beShow MoreRelated Relational and Object-oriented Database Management Systems Essay2156 Words   |  9 PagesRelational and Object-oriented Database Management Systems A database is a â€Å"shared collection of logically related data designed to meet the information needs of multiple users in an organization† (Hoffer 709). Databases contain data records or files, such as sales transactions, product catalogs and inventories, and customer profiles. Databases allows multiple users in an organization to easily access, manage, store, and update data when needed. 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