关于数据库系统设计中面向对象技术的应用外文翻译-中英文论文翻译

论文题目：关于数据库系统设计中面向对象技术的应用

第一部分外文翻译

Application of object-oriented database system

design technology

Abstract: The basic idea of object-oriented technology and development process, describes the implementation of object-oriented technology. A detailed discussion

with concrete examples in the database system architecture design and detailed design of object-oriented technology, the use of surface to the object database system analysis and design methods, the use of the UML tool to establish a specific object model, gives a more general-purpose database system development model systems designed to use the mode reuse, and easy to maintain, in order to effectively improve the quality of the development of database systems.

Keywords: Object-Oriented Database System Designed Object Model

An Object-Oriented Basic Concepts Of

1.1 Object (Object) Method (Method) And Message (Message)

Objective world is constituted by the entities in the objective world and their mutual relationship between the objective world of abstract entities for objects in

the problem space we need to solve different problems, we face the object is different, so the object is not fixed. A book can be an object, a library can also be

an object. Dynamic point of view, the object and its operation is the behavior of

the object, an object is usually defined as: the object is operating on a set of information and its above description.

Private data structure and processing, these processes also known as operations (Operation) or method (Method), including control and process private data, said

the state of the object, the state only by a private operation to change, whenever

the need to change the object the state, you can only send messages to the object

by other objects.

Message is used to request the object to perform an operation or to answer certain requests for information, the message unified data flow and control flow, program execution is against the objects pass the message that the message in the form of news mode. different messages of the same message mode, the interpretation and processing by the same object are the same, but operating results due to the different state of the object. a message of a schema defines object, all messages mode and message mode processing capabilities, define the external characteristics of the object.

1.2 (Class), Instance (Instance), Inheritance (Inheritance)

In the objective world, there are many things that have the same characteristics, such as: cars, buses, trucks, etc., can be classified as a motor vehicle. From the object point of view, common property, common operational nature a collection of objects is class, and a single object is an instance of the corresponding class. For example: the book is a class, a specific book, such as << >> of object-oriented analysis is an instance of the class, any object is instance of a class, and inherit the class definition of private data and operations. This is the inheritance of a class is essentially defined an object type.

Constitute a class hierarchy, the relative upper superclass, the relatively lower subclass, subclass inherit the super class's private data structure and operation at

the same time can have its own private data structures and operations. If a