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More articles by Jos Warmer

Author Bio
Jos Warmer is the primary author of the OCL standard. He is an active member of the Unified Modeling Language (UML) Revision Task Force, which defined the revisions in the UML 2.0 standard. Previously he was a member of the UML core team, where he was responsible for the development of the Object Constraint Language (OCL). The author of several books and numerous international articles, Jos is senior ICT Consultant at Ordina, a large Dutch software house.
For Enterprise Zone | July 6, 2005
By thinking of associations as marriages, we've hit on a way of making even complex associations easy to learn. In part 2 of this series on UML associations, we look at a way of upgrading associations to classes, in order to use instantiation.
For Enterprise Zone | June 28, 2005
Some UML concepts are more difficult to grasp than others, and associations are a concept that proves the rule. But by thinking of associations as marriages, we've hit on a way of making even complex associations easy to learn. Walk through this tutorial, which includes implementation examples in Octopus.
For Enterprise Zone | April 4, 2005
In recent years, two new trends in software engineering have been established—Aspect-oriented Programming (AOP) was developed to extend and ease programming, and the Model Driven Architecture (MDA) was introduced to take full advantage of the power of modeling. Many people are confused when confronted with both AOP and MDA. This article provides a crash-course on both topics and explains the differences and similarities between the two.
For Enterprise Zone | December 22, 2004
As software becomes more and more complex, the need for modeling increases exponentially. Learn about the six different levels of modeling maturity and why they're so important for you to begin implementing now—before it's too late.
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