Cyber-physical or logical: Represents the connection of the cyber and physical worlds as a combination of physical and virtual entities to generate meaningful information. Similar to virtual entities, they commonly use web services technology to send and receive data and interact with the physical world. They are autonomous objects augmented with sensing, actuating, processing, storing capabilities. Examples of cyber-physical entities are web services dedicated to providing weather information resulted from physical sensors that sense weather information and virtual sensors that process historic weather data.