Title :
A Query Language for Information Retrieval from GML
Author_Institution :
Indian Inst. of Technol., Kharagpur, India
Abstract :
Geography Markup Language (GML) is becoming the de facto standard for electronic data exchange among the applications of Web and distributed geographic information systems. However, the conventional query languages (e. g. SQL and its extended versions) are not suitable for direct querying and updating of GML documents. Even the effective approaches working well with XML could not guarantee good results when applied to GML documents. XQuery is a powerful standard query language for XML. This study will investigate a query language specification to support spatial queries over GML documents by extending XQuery. The data model, algebra, and formal semantics as well as various spatial functions and operations of this proposed query language are presented in detail.
Keywords :
Internet; SQL; XML; algebra; data models; electronic data interchange; geographic information systems; information retrieval; specification languages; GML documents; SQL; World Wide Web; XML; XQuery; algebra; data model; de facto standard; distributed geographic information systems; electronic data exchange; formal semantics; geography markup language; information retrieval; query language specification; spatial query; Data models; Database languages; Encoding; Geography; Information retrieval; Information systems; Markup languages; Telecommunication computing; Tree graphs; XML; GML; XML; XQuery;
Conference_Titel :
Recent Trends in Information, Telecommunication and Computing (ITC), 2010 International Conference on
Conference_Location :
Kochi, Kerala
Print_ISBN :
978-1-4244-5956-8
DOI :
10.1109/ITC.2010.37
