Third step of the implemented scenario: Registering a dynamic filter rule. This sequence diagram visualizes the different actions taken during the third step of the scenario realized by the implemented prototype. In this step, the local domain-specific ontologies of the Home Automation and oNCS Application Components are updated to signal to these components that a particular patient has a concussion. The oNCS Application Component uses its local domain-specific knowledge to derive that this patient is sensitive to light. Consequently, the oNCS Application Component registers a filter rule to receive specific context information pertaining to the light intensity in this patient’s room. The filter rule is depicted in green. The “par” indicates that the different application components can perform their actions in parallel.