An Implementation of a Temporal and Spatial Extension of RDF and SPARQL on top of MonetDB-Phase I

In this deliverable we present the second phase of the implementation of our temporal and spatial extensions of RDF and SPARQL, called stRDF, RDFi and stSPARQL, in the system Strabon. This follows deliverable D4. 1., in which we documented the first implementation phase of the system Strabon.First, we present the valid time dimension of the data model stRDF and the query language stSPARQL and their implementation in Strabon. The valid time functionality, together with the geospatial features of Strabon, make Strabon the first spatio-temporal RDF store with many features and excellent performance as shown by our experimental evaluation.