The construction of Object-Oriented Database Management Systems 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
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should aim to identify which objects are accessed by which of these processes. Transactional analysis should analyse the transactional requirements of each use-case‚ and the objects that are accessed in each transaction. Object interaction diagrams are useful in this respect. The OO design phase should include the design of optimal access and index structures to support the navigation paths of the most important use cases‚ and the concurrency characteristics of the system should be explored with techniques
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C h a p t e r 15 Object-Oriented Database Development L E A R N I N G O B J E C T I V E S After studying this chapter‚ you should be able to: ● Concisely define each of the following key terms: atomic literal‚ collection literal‚ set‚ bag‚ list‚ array‚ dictionary‚ structured literal‚ and extent. ● Create logical object-oriented database schemas using the object definition language (ODL). ● Transform conceptual UML class diagrams to logical ODL schemas by mapping classes (abstract and concrete)
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studies &research Information technology department Database systems Report on: (Comparison between Relational database & object oriented database) By: Mohammed Hussein Mahmoud Mustafa khedr To: Dr. Saad Darwish Introduction A database is a means of storing information in such a way that information can be retrieved from it. Thus a database is typically a repository for heterogeneous but interrelated pieces of information. Often a database contains more than one table. Codebooks and dictionaries
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Object oriented system development is an approach to system design in which the development process of the entire system is decomposed into smaller independent stages called objects. It is considered to be a partial lifecycle. Each object and its attributes are abstract entities and is characterized by its functionality. Using the functionality of objects they can further be grouped in classes. Object oriented system development is characterized by reusability of components i.e. Objects that
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2003 Page1 Object-Oriented Requirements Engineering and Management Joseph E. Kasser DSc‚ CEng‚ CM‚ MIEE Systems Engineering and Evaluation Centre University of South Australia (UniSA) Mawson Lakes South Australia‚ 5095 Joseph.kasser@unisa.edu.au Abstract Object-Oriented requirements engineering is an approach to encapsulating information about the process and product‚ as well as functionality into a requirements object. This paper identifies properties of a requirement object based on information
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Companies are adopting business intelligence system within their organizations because by using the system reports they can gain the advantages of understanding their internal strength and weaknesses to face external competitors and challenges to increase profits and reduce cost on their everyday operations and processes. (b) One quoted advantage of implementing a Business Intelligence systems is the concept of a ‘single version of the truth’ Explain what this refers to? ‘Single version
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Chapter 1 1. What is information systems analysis and design? Complex organization process‚ used to develop and maintain computer-based information systems‚ also it’s used by a team of business and systems professionals. 2. How has a systems analysis and design changed over the past four decades? 1950s: focus on efficient automation of existing processes 1960s: advent of 3gl‚ faster and more reliable computers 1970s: system development becomes more like an engineering discipline 1980s:
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Database management systems A database management system (DBMS) consists of software that operates databases‚ providing storage‚ access‚ security‚ backup and other facilities. Database management systems can be categorized according to the database model that they support‚ such as relational or XML‚ the type(s) of computer they support‚ such as a server cluster or a mobile phone‚ the query language(s) that access the database‚ such as SQL or XQuery‚ performance trade-offs‚ such as maximum scale
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The Object Oriented Model The object-oriented(OO) model actually had its beginning in the 1970s‚ but it did not see significant commercial use until the 1990s. This sudden emergence came from the inability of then existing RDBMSs (Relational Database Management Systems) to deal with complex data types such as images‚ complex drawings‚ and adio-video files. The sudden explosion of the Internet and the World Wide Web created a sharp demand for mainstream delivery of complex data. An object is a
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