Name, phone number and address in order to contact him or her. We think might do business with us in the future. A customer is any person who has done business with us or who After meetings andĭiscussions with the managers/owners of the business, we might agree on theįollowing description of a customer. To sell anything, we need to model the customers of ourīusiness, so Customer will be our first class (entity type).

Throughout this tutorial, we’ll build a sales database - itĬould be for any kind of business. They are excluded as attributes in the UML class. As these are not natural nor descriptive, Of the internal implementation of the database often, these are artificially Similar attributes that a database developer may introduce only for the purpose To the enterprise about the objects being modeled these are sometimes called

Those which actually provide real-world information relevant In UML, we will only identify descriptive attributes. Objects (entities in ER) or database tables. Together, they provide the structure for our Each attribute is one piece of information that characterizes each Of attributes (UML and ER), also called properties The enterprise, as two class diagrams could use the same class name and yetĪttributes Each class is uniquely defined by its set This helps us to know exactly what this class means in description The first step in modeling a class is to describe it in natural name the name of the class is nearly always a noun as it represents a thing or fact.

We are interested in the following important aspects of a UML class. It could be a physical “thing” (e.g., a store, an animal, etc) or simplyĮvent that happens in the real world (e.g., the lending of a book). Tutorial we use only a subset of UML here, we introduce a UML class.Ī UML class (ER term: entity type) is used to modelĪny “thing” in the enterprise that is to be represented in our database. “thing” or simply a fact or an event that happens.Ĭomplex object oriented software systems and thus the language is thorough. We model aspects of the real world, we find that we need to represent a physical In UML using classes and shows how to implement them in the relational model.Ī database has information that is representative of the real world. This article introduces how to model such things or objects Basic structures: classes and schemes Objects/things modeled by UML classesĭatabases model enterprises where we find objects or things crucial to the

Class diagram adalah