a licenseplate b licenseplate within 1 h profile 1 b c mutual exclusive 1 h it is noted that including the time element is an extension to the original behavior profiles which have no notion of time this denotes that events b c cannot occur within 1 hour for the same vehicle profile 2 f g strict order 10 m this denotes that events f g cannot occur in reverse order within 10 minutes for the same vehicle 1 profile 3 f g mutual exclusive 1 h this denotes that events f g cannot occur within 1 hour for the same vehicle select a picture a model a color a speed b speed from a u2192 b amp amp not c where a licenseplate b licenseplate and a licenseplate c licenseplate within 1 h select u201c b c not mutual exclusive u201d from b amp amp c where b licenseplate c licenseplate within 1 h a further non limiting example illustrates another embodiment of the present invention that relates to semantic support in cep queries using a knowledge base to resolve semantic operators the knowledge base includes information about the relationships between people and in this example a query detects if a building is sequentially observed by several mutually acquainted suspects a simplified version of such a.