Design Issues of OMEGA: An Object-Oriented Multimedia Database Management System

概要

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OMEGA is an object-oriented multimedia database management system under development at the University of Library and Information Science. Some of the design issues of OMEGA are reported in this paper. First, the multimedia data modeling is disussed. It is stressed that the object-oriented approach is essential in order to organize and manage multimedia data. The Referred Object Integration method for multimedia database organization is presented that is semantically more powerful than the hypermedia approach. Next, the object model of OMEGA is investigated. It is shown that traditional object-oriented models are not powerful enough to represent multimedia objects. Some extensions are made for representing part hierarchy and temporal and spatial information about multimedia data. Object identity and equality are characterized. Type issues and object management schemes are also examined. After this, the language model of OMEGA is investigated and the design of the class definition, the query, and the database programming language are discussed. The problem of how to translate Smalltalk objects into C+ + objects, and vice versa is investigated with a view to supporting multiple object-oriented database programming languages with persistent object-sharing capability in OMEGA. The object-oriented and the SQL-like syntax of the class definition and the query language are also described.
一般社団法人情報処理学会の論文
1991-03-31