GDL

The authoring of this book coincides with the final review of the UML 2 pro-

posal; therefore, we did not have the benefit of UML 2–compliant tools. This

book focuses on good modeling with UML, relying on the UML 2 features that

make sense logically. While we looked at a few early versions of tools, we did

not find the support for features we are accustomed to in the current UML sup-

port tools. However, we have included a set of links to vendor sites on the CD

for this book. With the speed of development of these tools, we are confident

that the reader will find demonstration versions that support UML 2 at practi-

cal levels.

UML 2 allows greater variation in the way diagram elements look. The val-

idation and interchange of UML files now uses a mark-up language, so the

actual look of a feature might change between tools. However, with better sup-

port for model management and with clearer rules for connecting all the dif-

ferent diagrams, UML 2 should be far easier to use in tools than UML 1.

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