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1. Difference between oodbms and rdbms pdf how to#
2. Difference between oodbms and rdbms pdf manual#
3. Difference between oodbms and rdbms pdf code#
4. Difference between oodbms and rdbms pdf plus#

However, the connection type is irrelevant. A web browser needs an internet connection. Abstraction helps reduce the complexity of modeled data and allows reusability.įor example, there are different ways for a computer to connect to the network. The process selects vital information while unnecessary information stays hidden. AbstractionĪbstraction is the procedure of representing only the essential data features for the needed functionality. A class encapsulates all the car information into one entity, where some elements are modifiable while some are not. You can change the color of a car, yet the model or make are examples of properties that cannot change. Classes interact with each other through methods without the need to know how particular methods work.Īs an example, a car has descriptive characteristics and actions. Through this process, pieces of information and details of how an object works are hidden, resulting in data and function security. EncapsulationĮncapsulation is the ability to group data and mechanisms into a single object to provide access protection. Both child classes inherit information from the parent class and extend the parent class with new information depending on the vehicle type. The existing class is the parent class, while the child class extends the parent.įor example, a parent class called Vehicle will have child classes Car and Bike.

Difference between oodbms and rdbms pdf plus#

Defining new types inherits all the existing class fields and methods plus further extends them.

Difference between oodbms and rdbms pdf code#

Inheritance creates a hierarchical relationship between related classes while making parts of code reusable.

The defined action is polymorphic - the result changes depending on which vehicle performs. In this example, the action break is a polymorphism. Both a car and a bike are able to break, but the mechanism is different. This ability allows the same program code to work with different data types. Polymorphism is the capability of an object to take multiple forms. These four attributes describe the critical characteristics of object-oriented management systems. The four main ideas of object-oriented programming are: Object-oriented databases closely relate to object-oriented programming concepts. This approach unifies attributes and behaviors of data into one entity. An object-oriented management system provides supported functionality catered to object-oriented programming where complex objects are central. Both sets of requirements are equally important.These characteristics make object databases suitable for projects with complex data which require an object-oriented approach to programming. Then, one has to account for the additional requirements which result from the new product characteristics inherent to hypermedia.

Difference between oodbms and rdbms pdf how to#

The fact that it is a software environment where hypermedia design takes place implies that one has to analyze first how to support authoring and production activities in general in such an environment. The goal is that this methodology is based on a foundation for hypermedia design. should be based on a thorough understanding of the new and critical aspects of this new medium for communicating knowledge. What is needed is an orientation or even better a methodology for hypermedia designers which. It is obvious that how designing is done has a strong impact on what is finally produced, distributed, and used. While there is a long tradition in the design of traditional paper-based documents, there is little or no tradition in designing hypermedia documents or more general hypermedia applications. As a result, the process of learning skills is visualized and some basic characteristics of the process are obtained. Next, how the strategy of the assembly task evolves through experiences is also analyzed through the task sequence tree model. The effectiveness of the model in this aspect is confirmed through applying it to some experimental performances of an assembly task.

In this paper, it is first argued that the task sequence tree model is also useful for analyzing how an assembly task is currently performed and supporting to find how it should be modified. However, the designed strategy may not be the optimal, especially for a complex assembly task, and hence further improvement will be crucial in practice. and the obtained strategy has been confirmed to be a good starting point through laboratory experiments. How to design an appropriate task sequence tree for a given assembly task has been developed. The way of performing an assembly task under uncertainties is expressed by a strategy having branches, and the strategy can be expressed by a tree called the task sequence tree.

Difference between oodbms and rdbms pdf manual#

This research aims at providing a method of designing and improving a manual assembly task to be performed under uncertainties.