Architecting and designing : UML 2.5 : Model Elements : Association Node : CommunicationPath
  
CommunicationPath
A Communication Path is a type of association that is used between Nodes, in which you model how the Nodes exchange messages and signals. When you specify Communication Paths, you can define the number of nodes that can be connected at each end.
The following options are available for drawing Communication Paths:
Communication Path (through AssociationNode (Invisible) symbol
Draw the CommunicationPath node, then connect the CommunicationPath node to relevant Nodes using the AssociationClass to AssociationNode symbol, or the AssociationNode to Class as Property symbol.
This graphic is described in the surrounding text.
This graphic is described in the surrounding text.
Communication Path (through AssociationNode (triangular) symbol
Draw the CommunicationPath node, then connect the CommunicationPath node to relevant Nodes using the AssociationClass to AssociationNode symbol, or the AssociationNode to Class as Property symbol.
This graphic is described in the surrounding text.
See also
Association
AssociationClass
AssociationNode (Invisible)
Extension
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Association Node