Abstract
The algebraic approach has been proven to be an effective way to process queries, and algebraic operations in RDF have been investigated extensively. However, the study of spatiotemporal RDF algebra has just started and still needs further attention. This chapter aims to explore an algebraic operational framework to represent the content of spatiotemporal data and support RDF graphs. The authors define a spatiotemporal data model based on RDF. On this basis, the spatiotemporal semantics and the spatiotemporal algebraic operations are investigated. The authors define five types of graph algebras. The filter operation can filter the spatiotemporal graphs using a graph pattern. Besides this, they put forward a spatiotemporal RDF syntax specification to help users browse, query, and reason with spatiotemporal RDF graphs. The syntax specification illustrates the filter rules, which contribute to capturing the spatiotemporal RDF semantics and provides a number of advanced functions for building data queries.
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