Title :
Towards an XML-Based Query and Contextual Information Model in Context-Aware Mobile Information Systems
Author :
Mansour, Essam ; Hopfner, H.
Author_Institution :
Sch. of Inf. Technol., Int. Univ. in Germany, Bruchsal
Abstract :
Nowadays database systems (DBSs) are state-of-the art for managing complex data in information systems. Unfortunately, DBSs are not aware of the context of their usage. Query results are retrieved without considering the context of the user/device issuing the query. In many cases, this feature is added by a context managing middle-ware. This paper outlines a scenario for context aware mobile services. In the paper we introduce an XML-based XREAL model for formalizing contextual information and queries highlighted in the scenario and discuss how XREAL can be implemented in a modern database system. By utilizing XREAL, it is possible to realize context aware mobile information systems based on the available DBSs without additional middle-wares.
Keywords :
XML; database management systems; middleware; mobile computing; query processing; recursive functions; relational algebra; tree data structures; XML-based query; XREAL model; context managing middleware; context-aware mobile information system; contextual information model; database system; recursive relational algebra tree; Algebra; Conference management; Context awareness; Context modeling; Context-aware services; Database systems; Information systems; Information technology; Management information systems; Technology management; Context-Aware Mobile Information Systems; Context-Aware Query Processing; XML-Based Contextual Information; XML-Based Relational Algebra;
Conference_Titel :
Mobile Data Management: Systems, Services and Middleware, 2009. MDM '09. Tenth International Conference on
Conference_Location :
Taipei
Print_ISBN :
978-1-4244-4153-2
Electronic_ISBN :
978-0-7695-3650-7
DOI :
10.1109/MDM.2009.99
