The model we propose in this chapter is named Geographic Multimedia Temporal Graphical Model (GeoMTGM). A GeoMTGM graph is a directed, labeled graph, with a single root; it is based on the Multimedia Temporal Graphical Model (MTGM) and allows us to represent geographic and semistructured data, with particular attention to their temporal aspects. In particular GeoMTGM deals with the valid time (i.e., the time at which a fact is true in the considered domain) of both objects and their relationships. GeoMTGM is a new proposal in the context of semistructured multimedia spatio-temporal data.
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