1 SysML diagram types.
Diagram Name and Type Abbreviation
Activity diagram act
Requirement diagram req
Use case diagram uc
Block defi nition diagram bdd
Internal block diagram ibd
Package diagram pkg
Parametric diagram par
Sequence diagram sd
State machine diagram stm
Matrix ??’
Table ??’
4.11 General Modeling Elements
FIGURE 4-59
Example for a rationale.
req [package] Sizes [enclosure for central unit]
?«requirement?»
Enclosure size central unit
?«requirement?»
id???REQ2.1???
text???The central unit of the on-board
computer has to fit in a
DIN compartment.???
?«rationale?»
The on-board computer has to be
built in the car radio compartment.
268 CHAPTER 4 SysML??”The Systems Modeling Language
describes a block defi nition diagram that represents the content of the package
system context .
The diagram frame is a mandatory description in SysML. The title has to
include the type and name of the model element, while the model element type
and diagram name are optional. If the elements represented in the diagram are
not within the namespace of the model element that is shown in the diagram,
then they have to be fully qualifi ed, for example, requirements::core::functional::
security rather than just security .
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