Paper 2
The HIT Model: Workflow-aware Event Stream MonitoringAuthors: Olga Poppe, Sandro Giessl, Elke A. Rundensteiner, and Francois Bry |
AbstractReal-time reactive applications from supply chain tracking to health care data analytics have increasingly gained on importance and complexity. To facilitate the speci cation of involved event-based application semantics, we introduce a novel model HIT that fi nds a middle ground between a specifi cation composed of a large set of low-level queries versus a high-level graphical workflow description. The workflow is captured by the Hierarchical Instantiating Timed automaton (HIT), while succinct queries are formulated within its states which provide valuable context for launching query execution. HIT models an arbitrary number of event-driven sequential or concurrent hierarchical processes as required for realization of complex real-world applications using a succinct yet expressive specifi cation. The e ffectiveness of HIT is illustrated by a full case study of the auction scenario. |