基于XQuery符号表示法的模糊时空数据查询  

Fuzzy Spatiotemporal Data Queries Based on XQuery Symbolic Notation

作　　者：柏禄一[1] 严丽[2] 马宗民[1] 

机构地区：[1]东北大学信息科学与工程学院,辽宁沈阳110819 [2]东北大学软件学院,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2013年第4期505-508,共4页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(60873010;61073139);教育部新世纪优秀人才支持计划项目(NCET-05-0288);中央高校基本科研业务费专项资金资助项目(N090504005)

摘　　要：讨论了模糊时空数据查询的概念,研究了模糊时空数据时态查询、空间查询、属性查询和时空查询的各类查询形式及查询特性,基于XQuery提出了模糊时空数据查询的统一符号表示法,并对典型查询进行了举例说明.此外,还讨论了XQuery模糊时空扩展问题,包括XQuery表达上的扩展、处理上的扩展及体系结构上的扩展.提出的表示法可以表示时空查询语言STQL和移动目标查询语言FTL中规定的各类查询,并可以消除由不同查询表现形式带来的语义混淆,以对各类模糊时空数据查询进行统一表示.The conception of fuzzy spatiotemporal data queries was discussed. Fuzzy temporal queries, spatial queries, attribute queries, and spatiotemporal queries of fuzzy spatiotemporal data were studied. A symbolic notation for fuzzy spatiotemporal data queries was proposed on the basis of XQuery. The typical queries were shown by examples and explanations. In addition, the fuzzy spatiotemporal extensions of XQuery were discussed, including extensions of representation, extensions of management, and extensions of architecture. Queries in STQL and FTL could be represented using the proposed symbolic notation. What＇ s more, semantic confusion caused by different forms of spatiotemporal query representation could be eliminated, and a uniform representation of various types of queries on fuzzy spatiotemporal data could be obtained.

关 键 词：模糊时空数据 查询语言 XQUERY FLWOR语法 符号表示法 

分 类 号：TP302.1[自动化与计算机技术—计算机系统结构]