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KNOWLEDGE-BASED SOFTWARE ENGINEERING phần 6

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Trong phương pháp này là một trong những tìm kiếm kết hợp các mạng trước đó đã thảo luận và các công nghệ XML bằng cách sử dụng từ điển thông thường và bản thể chia sẻ, cho phép trao đổi chặt chẽ hơn của các nguồn dữ liệu đúng định nghĩa. | K. Salmenjoki and R. Jantti Using Mobile Devices for Personalized Information 159 Information centric data integration Figure 5. Information centric XML Protocol enhanced web services original source http www.w3.org 2001 04 roadmap ws.svg In this approach one is looking for combining the previously discussed networking and XML technologies using common dictionaries and shared ontologies which enable a tighter exchange of strictly defined data sources. The connection between services and VHE is that the service can use authentication routing etc functions provided by the network through the common framework interface of OSA. One problem here presently is a scattering of the XML technologies especially in the Schema section and vendor and user commitment to these standards instead of inventing new ones like Microsoft s c or Nokia s Mobile Internet Technical Architecture MITA efforts . Gradually when the applications will contain in-build XML usage a tighter integration of various networked information sources will be enabled. In Figure 5 above web services will finally enable the change from traditional paper trail into electrical transactions. The critical components to require from the network systems are service privacy QoS reliable messaging routing security and binary attachments. 5. Service portability and openness - the Virtual Home Environment and Open System Architecture Personalization of services requires that the service provider keeps track of user profiles. In a personalized setting the user must be able to define certain look and feel and functional properties for his mobile terminal. Some of this personification information can be stored locally in terminal and hence be available regardless of the access network. There are however several drawbacks with this concept. User could have several terminals in his disposal the memory of the terminal could be very limited for storing such information and a lot of bandwidth would be wasted by transmitting this