Tham khảo tài liệu 'development and implementation of rfid technology part 14', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | RFID Information Value Chain and ETRI RFID Ecosystem Value-added Environment Linking Physical and Virtual Worlds 381 combined with different sources residing in the legacy system or external sources such as purchased data services so that semantic events which are significant in the business domain are generated. Here the term semantic event means that as it says RFID data capturing events merely indicate raw observation and taking business actions based only on the event reports are somewhat limited therefore the raw observation events need to be combined with additional business context information in order to construct business events here we call semantic event upon which legacy applications can play with. Furthermore the reason why this stage is required is to enable sophisticated RFID-based data processing. As domain-specific information is integrated with RFID tag data content-based filtering and routing become possible by mapping and combining tag data with corresponding object information and applying basic filtering scheme on the combined data. In other way Event-Condition-Action or ECA rules Palmer 2006 can be applied to generate the semantic events. When a primitive tag data are delivered from the previous stage as an event the rule set associated with the event is evaluated and then appropriated actions are taken. For example ECA rule mechanism can be useful when predefined action is taken by the comparison of the captured tag list with the scheduled information with little human intervention. If the sensed tag list mismatches the schedule information another action to detect the problem can be taken. We may regard such the inference process as the semantic event generation process making use of RFID tag data and additional information stored in backend systems and supporting the conversion from raw RFID data to actionable information. Business process coordination Main objective in the stage is to enable business processes and solutions to .
