June 2003
Intermediate to advanced
984 pages
25h 13m
English
Content preview from UML™ Bible
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CHAPTER 18
Applying Constraints to the UML Diagrams
In This Chapter
- Defining the Object Constraint Language
- Defining OCL data types
- Defining OCL statements
- Creating invariants, preconditions, and post conditions
- Navigating association
- Working with collections, messages, and tuples
- Applying the OCL Standard Library
As I mentioned in earlier chapters, you can use a formal language, the Object Constraint Language (OCL), to specify constraints on attributes and associations, and, in fact, on any classifier.
There was a previous release of the same document under the title “UML 1.4 with Action Semantics.” To my knowledge, the only difference is the addition of the Action Semantics section. The OMG simply thought that the added content warranted a new version number. You will even find references to 1.4 in the OCL 2.0 specification.
A constraint may be specified as an invariant, a precondition, or a post condition. This description of a constraint reveals one very important fact about OCL: OCL is used to specify static requirements.
There has been work proposed to integrate a dynamic ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.