An Information Flow specifies that one or more information items circulates from its sources to its targets. Information flows require some kind of “information channel” for transmitting information items from the source to the destination.
An information channel is represented in various ways depending on the nature of its sources and targets. It can be represented by connectors, links, associations, or even dependencies. For example, if the source and destination are parts in some composite structure diagrams such as a collaboration, then the information channel is likely to be represented by a connector between them. Or, if the source and target are objects (which are a kind of Instance Specification), they can be represented by a link that joins the two, and so on. The Information Flow and the information item notation are added. You can draw them using the Information Flows toolbar in the Class Diagram or Composite Structure Diagram.
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Setting an Information Flow
An Information Flows can be set on Associations in the Class Diagram and on Connectors in the Composite Structure Diagrams.
Make sure the properties that enable to display Conveyed Information on the relationships are selected.
To display Conveyed Information
a. Right-click Association (Connector) and choose the Symbol Properties command. b. In the opened dialog, select the Show Conveyed Information A and Show Conveyed Information B check boxes.
Specify a Conveyed Information in the following ways: - Drag the Class or Information Item on an Association (Connector) and select Set as Conveyed Information command. - Select Association (Connector) relationship and from smart manipulator toolbar click .
In the New Conveyed Information dialog, select Conveyed Information, Information Flow, Direction and click OK. An Information Flow is set.
If new Information Flow is set on Connector that is represented in other diagrams, the new Conveyed Information is displayed only on that diagram on which you set it.