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S. Rozsnyai:
"Managing Event Streams for Querying Complex Events and Event Patterns";
Supervisor, Reviewer: S. Biffl, A. Schatten; Institut für Softwaretechnik und Interaktive Systeme, 2008; oral examination: 2008-04-15.

This dissertation introduces the complex event processing (CEP) system SARI and its
event processing model extension the Event-Base. SARI is a solution that is capable of
processing large amounts of events, providing facilities with the capability to monitor,
steer and optimize business processes in real-time. The Event-Base extends SARI´s
event processing model with an efficient up-to-date operational storage, together with
retrieval mechanisms for business events for analytical as well as operational purposes.
These systems are a promising solution to the lack of tracking business events,
maintaining the causal relationships and traceability between those events, as well as
aggregating them to high level events and creating correlations between them. These
capabilities of IT systems are required by businesses that have to adapt their processes
and organisation faster than their competitors and require a fast paced decision
making on tactical and operative levels. The query language SARI-SQL is settled
on top of the Event-Base and allows domain experts to concentrate directly on the
problem domain and easily gain insights due to the level of abstraction. SARI-SQL is
formally structured query language that creates an abstraction layer over events and
their internal data structures.