Theo Kanter, at Ericsson Research in Sweden writes about what he calls "ambient awareness" (we would call it situational awareness) in his article titled Cooperative Mobile Ambient Awareness.

Interestingly, he points out the need for a

... context ontology and a model of observed entities in the communication environment along with entity profiles and relations between those entities. This model has a dual purpose of being descriptive (enabling the entity to tell other entities what it knows about its environment) but also interpretable (enabling the entity to respond intelligently to context events that it may receive).

I agree: semantics (and ontologies as a way of capturing them) are very advantageous for situational software.