Using context models in defining intelligent environment information

A context model is defined with information represented and gathered from sensors, user profile, environment and other sources. The main advantage of using ontology is the ability to express machine-interpretable definition on basic concept and interrelation that enables the reuse of the constructed context models. The method of analyzing and designing context ontology will influence the relationship between context information and expression of user activities. By analyzing events, the associated services are defined. Once an event occurs to a particular user with a context model, we provide appropriate services to the user by using the most similar event in context ontology to execute the rule-based system.