For example, status information fl ows from the system
class on-board computer to the actor car management system ( Figure 3.90 ).
How the information is transported does not yet play a role in information fl ow
modeling.
FIGURE 3-89
Example for information structures.
class Navigation system information
Route Destination
Type of route
?«representation?»
?«representation?»
Waypoint
?«representation?»
3.10 Other Model Elements
220 CHAPTER 3 UML??”Unifi ed Modeling Language
FIGURE 3-90
Notations for information fl ows.
class Information flow
Car management system
?«system?»
On-board computer Status
Car service
employee
Status
?«flow?»
An information fl ow is denoted as a dashed arrow with the keyword ?«fl ow?» .
At the arrow appear information items, separated by commas, which fl ow in the
direction shown ( Figure 3.90 ). Alternatively, an information fl ow can be denoted
directly at the relationship that realizes it. This relationship is an association, if
the fl ow is between actor and system. An information fl ow is shown as a black
triangle that indicates the direction and attached to the relationship.
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