What is aggregation?

Are you preparing for IT certification? With practice questions, study notes, interactive quizzes, tips and technical articles, uCertify PrepKits ensure that you get a solid grasp of core technical concepts to ace your certification exam in first attempt.

What is aggregation?

Rating:

Aggregation is a strong form of association. It represents a part-of relationship.

It is transitive, i.e., if A is a part of B, and B is a part of C, then A is also a part of C.

It is antisymmetric, i.e., if A is a part of B, then B is not a part of A.

For example, a microcomputer is modeled as the aggregate of a sound card, an I/O controller, a CPU, etc. Each component is independent of the whole, i.e., a microcomputer, but its existence is more relevant for its use in the microcomputer as a composite whole, rather than its separate existence as a part.

In UML, an aggregation relationship is shown symbolically as a line and a diamond at the end of the association link.

The image below depicts the aggregation symbol.


Rating:



Other articles

Click here to Article home

 
uCertify.com | Our Company | Articles | Privacy | Security | Contact Us | News and Press Release | uCertify India
MCSE: MCSA, MCTS, MCITP    JAVA Certification: SCJP, SCWCD Cisco Certification: CCNA, CCENT, A+, Network+, Security+
Oracle Certification: OCP 9i, OCP 10g, OCA 9i, OCA 10g CIW foundation    EC-212-32    CISSP    Photoshop ACE    Adobe Flash ACE
© 2008 uCertify.com. All rights reserved. All trademarks are the property of their respective owners.