Event Query Processing in EPC Information Services.

Radio Frequency Identification (RFID) technology is an excellent substitute for barcodes in industry. However, the management of a large amount of RFID data, together with complicated relationships between data, in the context of responding to different kinds of queries is not well supported by traditional databases. Therefore, 1) an event-based model for managing data and 2) an algorithm for responding to event queries are proposed for RFID repositories in this paper Our approach is based on the specification of the EPC Information Services (EPCIS) to meet the overall data requirements of the RFID community. Specifically, the object-oriented model is built on the top of relational databases so as to make the proposed combined data model highly flexible and semantic comprehensive. Based on this data model, various complicated predicates implied in different parameters of the predefined event query are interpreted into one single request to the database.