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XML data are increasing in many areas including internet and public documentation. XML data change dynamically while processing the query. Many kinds of techniques have been researched to speed up the query performance about XML data structures. In this paper, based on the XML structure, we analyze the query pattern and propose the data mining technique about extracting the similar query pattern by the users. In this paper to speed up the performance we used FPgrowth algorithm for mining similar query patterns about the XML data structure. We confirmed that the proposed method using FP-growth algorithm applied to XML query subtrees outperforms Apriori algorithm. The proposed method gives the fast query result about the repeatedly occurring queries.18th International Workshop on Database and Expert Systems Applications 1529-4188/07 $25.00

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Context-aware is the core in ubiquitous environment of sensor network to support intelligent and contextual adaptation service. The new context information model is demanded to support context-aware applications. It should support various context representation and complex context-aware. In this paper, we define the context information according to context-aware process. The domain spatial ontology and application knowledge are represented using the spatial object model and the rules of expanded ontologies, respectively. The expression of abundant spatial ontology represents the context information about distance between objects and adjacent object as well as the location of the object. The proposed context information model which is able to exhibit various spatial context and recognizes complex spatial context through the existing GIS. This model shows that it can adapt to a large scale outdoor context-aware applications such as air pollution and prevention of disasters.