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In addition to atomic object fl ow ports, we also used a common and conjugated
object fl ow port here. The data that may be transported over these ports
are described in the object fl ow specifi cation FS_CustomerCard ( Figure 2.82 ).
The conjugated object fl ow port changes the data transport direction ( in
becomes out , and out becomes in ).
You can immerge as deeply into the system as you want, until you arrive at
single nuts and bolts. This is the reason why it is important to set yourself clear
limits to ensure that you won ??™ t get lost in the modeling depths. What do I want to
achieve with the models? For whom is the information useful?
In closing I want to show you how we produce a reference to the requirements
set forth in the beginning. It can easily happen that we forget looking at
our requirements as we proceed in our work, but only they determine what the
system is to perform. SysML offers the satisfy relationship, which can be used to
connect a model element, e.g., a block, with the requirement that is realized by
this element ( Figure 2.


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