DMH’s virtualization – the DMH virtualizes the robot objects of different capillary networks as well as other user objects (i.e. caregivers and technical support staff) are virtualized at this stage. Unlike the robot virtualization where each VO is constrained by the capability of the associated PO, more complex VOs, called composite VOs (CVOs) are required at this stage to represent the case where multiple VOs collaborate to accomplish a particular task. For example, the physician VO needs to collaborate with the medical sensor VOs to create and deliver a warning message/advice to the patient when the disease management outcome deviates from a pre-specified target. Semantic features of such a CVO describe its capabilities and relationships with other objects and thus help locating suitable objects that can respond to a certain service request.