disadvantages of using an ERD instead of a class diagram when using Object Oriented Programing

Question

hello everyone can someone pls help me on this one?i need to know what are the disadvantages of using an Entity Relationship Diagram instead of a class diagram when using OOP? thanks everyone.

Suthish Nair · Answer

Accept the post as Answer, if resolved !

Suthish Nair · Answer

How come my post got accepted as Answer?

azzo trigo · Answer

thanks again Vulpes,your great.

Vulpes · Answer

Wikipedia have a decent article on ERDs ( http://en.wikipedia.org/wiki/Entity-relationship_model ). Also, whilst it's a bit rambling at times, I found this link ( http://members3.jcom.home.ne.jp/daruma_kyo/en/aboutooa/classD_ERD_classExtraction.html ) which brings out the differences between class diagrams and ERDs.

azzo trigo · Answer

thanks vulpes you are great,i wonder if you could suggest were i could read further on this.thanks

Vulpes · Answer

Entity Relationship Diagrams are more limited in scope than class diagrams. If you were trying to use them as an alternative to the latter, then: 1. They wouldn't deal with how your classes interacted with each other. 2. They wouldn't deal with how the data in your classes could be manipulated. For these reasons, ERDs are usually confined to modelling relational databases rather than whole applications.

disadvantages of using an ERD instead of a class diagram when using Object Oriented Programing

Answers (6)