10.2.
Each good SysML/UML tool supports this form of language extension. Ideally, the
profi le can be developed independently and used for your respective project model.
Many modeling tools come with various stereotypes. Unfortunately, they are
not always explained and often mixed among the pure SysML/UML elements so
that it is diffi cult for developers to see whether they are looking at a pure language
element or a stereotype. The situation in the literature is similar. This is why
I knowingly paid attention in this book to separate the profi le description from
the UML and SysML descriptions.
5.1 Actor Categories
Systems Engineering
Profi le??”SYSMOD 5
CHAPTER
Defi nitions
An environmental effect is a factor from the environment that infl uences the
system without communicating with it directly.
It is a stereotype ?«environmentalEffect?» of the UML element actor.
272 CHAPTER 5 Systems Engineering Profi le ??”SYSMOD
An external system is a system that interacts directly with the system to be modeled.
In its role as an interaction partner, the external system is seen merely as a
black box.
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