... line of reference that we use. In the first three cases,we use the east line of (i.e., in Fig. 9), in the fourth case, we usethe south line of and in the last case, we use the north line of In ... time-varying document. A snapshot is an instance of a time-varying document at a single point in time. For instance, if the schemaasserts that an element is mandatory (minOccurs=1) in the context of ... Reasoning with CardinalDirections. In Proceedings of the 7th International Conference on Principles andPractice of Constraint Programming (CP’02), volume 2470 of LNCS, pages 341–355. Springer,...