Optimal support of professionals in complex ambient task environments requires a system that delivers the Right Message at the Right Moment in the Right Modality: (RM)
. This paper describes a content-based design methodology and an agent-based architecture to enable real time decisions of information presentation according to (RM)
. We will describe the full development cycle of design, development, and evaluation. Ontologies are regarded as key enablers as they define the classes and attributes to allow (RM)
delivery. As a case study, we describe an ambient computing application for human-robot interaction in the Urban Search and Rescue domain.