Interface for classes that wish to implement a Context Bus based on uAAL buses
Instances of this class can be used to exchange info about the state of context elements using the model of RDF statements.
Defines the patterns used to match which events must be forwarded to which subscribers.
Provides the interface to be implemented by context publishers together with shared code.
Provides the interface to be implemented by context subscribers together with shared code.
The default context publisher simply ignores the notification about losing connection to other instances of the middleware.
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