A query language for moving object trajectories
Hoda M. O. Mokhtar, Jianwen Su · 2005
Trajectory properties are spatio-temporal properties that describe the changes of spatial (topological) relationships of one moving object with respect to regions and trajectories of other moving objects. Trajectory properties can be viewed as continuous changes of an object’s location resulting in a continuous change in the topological relationship between this object and other entities of interest. In this paper we develop a query language TQ for expressing trajectory properties. Our model and query language are based on the framework of constraint query languages. We present some preliminary complexity and expressive power results for the proposed language. 1