Spatio-temporal Query Algebra Based on XML Data Model
Xiaohu Liu · Geospatial Information · 2011
The spatio-temporal query algebra is one kind of abstract spatio-temporal query language;it uses the subset of basic predicates,operations,the functions of spatio-temporal abstract data type to express the spatio-temporal query.While the data model of the spatio-temporal microscopic operates employed the XML data model which the Native XML Database(NXD) adopt to store semi-structured spatial-temporal data,therefore this article held the space and time expansion to the XML query algebra-XQuery FS data type and the query,and introduced in GML to describe the geography feature and it's relationships,has defined one kind newly based on the XML data model space and time inquiry algebra.