Query evaluation on efficiently encoded GML streams

摘要：

We consider the growing need for querying GML stream and the bulkiness of textual GML.To get things better,we firstly analyze the applicability of Efficient XML Interchange (EXI) encoding for GML and propose EXI encoded GML.Then we develop the SITPath query language supporting geospatial data types and some rich characteristics inherited from XPath within the constraints of streaming limitation.We subsequently present the streaming query evaluation algorithm and some main parts of EGQ engine that evaluates SITPath queries on EXI encoded GML without decoding in advance.Finally,the experimental results indicate the practical time and space performance advantages of EGQ brought about by the query evaluation algorithm and EXI encoding.

关键词： GML EXI SITPath EGQ streams query evaluation

作者: Yan Jie Fang Jinyun Han Chengde

作者单位: Laboratory of Spatial Information Technology,Institute of Computing Technology,Chinese Academy of Sc Laboratory of Spatial Information Technology,Institute of Computing Technology,Chinese Academy of Sc

会议类型: 国际会议

会议名称: 第16届国际地理信息科学与技术大会(16th International Conference on GeoInformatics and the Joint Conference)

会议地点: 广州

会议语种:英文

在线出版日期: 2008-06-28（万方平台首次上网日期，不代表论文的发表时间）