UML2.1.2: 17.2 InformationFlows:
'Information flows describe circulation of information in a system in a general manner. They do not specify the nature of the information (type, initial value), nor the mechanisms by which this information is conveyed (message passing, signal, common data store, parameter of operation, etc.). They also do not specify sequences or any control conditions. It is intended that, while modeling in detail, representation and realization links will be able to specify which model element implements the specified information flow, and how the information will be conveyed.'
UML2.12 17.2.1 InformationFlow (from InformationFlows)
'An InformationFlow 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 may be
represented by connectors, links, associations, or even dependencies. For example, if the source and destination are parts
in some composite structure 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 InstanceSpecification), they may be
represented by a link that joins the two, and so on.'
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