Complex Event Processing (CEP

Event-driven information systems demand a systematic and automatic processing of events. Complex Event Processing (CEP) encompasses meth-ods, techniques, and tools for processing events while they occur, i.e., in a continuous and timely fashion. CEP derives valuable higher-level knowledge from lower-level events; this knowledge takes the form of so called complex events, that is, situations that can only be recognized as a combination of several events. 1 Application Areas Service Oriented Architecture (SOA), Event-Driven Architecture (EDA), cost-reductions in sensor technology and the monitoring of IT systems due to legal, contractual, or operational concerns have lead to a significantly increased generation of events in computer systems in recent years. This de-velopment is accompanied by a demand to manage and process these events in an automatic, systematic, and timely fashion. Important application ar-eas for Complex Event Processing (CEP) are the following