Querying GML Documents: An XQuery based Approach
GML is an XML encoding for representation and exchange of geographic information. With the popularity of GML, more and more spatial data exists in GML format. It raises the problem of how to query the data in GML. Since GML is based on XML, query technologies for XML can be employed to GML. However, the fact that GML differs from XML in many aspects makes these technologies not so applicable for GML. The standard query language Xquery, which is recommended by W3C, only applies to GML non-spatial queries. To query GML documents, we propose a GML query processor by extending Xquery in datatypes and spatial operators. The processor can deal with non-spatial and spatial queries, and output the query results in GML format.
GML XML XQuery GML Query Processor GQL
Fubao Zhu Hui Chen Jihong Guan
School of Computer and Communication Zhengzhou University of Light Industry Zhengzhou, 450002, China Dept. of Computer Science and Technology Tongji University Shanghai, 201804, China
国际会议
成都
英文
393-396
2010-06-12（万方平台首次上网日期，不代表论文的发表时间）