Abstract
RDF is the W3C standard, whose model is defined as a triple. RDF is designed to provide a common way of describing resource so that it can be read and understood by computer applications. In RDF model, the statement in the resource description may correspond to a natural language statement, the resource corresponds to the subject in the natural language, the attribute type corresponds to the predicate, and the attribute value corresponds to the object. Meanwhile, RDF information has temporal attribute and spatial attribute. But classical RDF model can’t show the spatial and temporal properties of resources. So, combining spatiotemporal information with RDF is necessary. However, SPARQL, the W3C-recommended query language of RDF, only meets the classic RDF query. This paper presents a novel representation model of spatiotemporal RDF. Based on this model, a Find Isomorphic Graphs of the Query Graph algorithm is introduced to obtain some candidate isomorphic graph of the query graph. Finally, we define the process of pattern matching.
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