Use Oracle technology for spatial RDF graph query
I came across a paper by Matthew Perry and his colleagues, in which they described an system implementation that builds on Oracle DB technology to enable the store and query of spatial and temporal RDF data. There are many Semantic Web tools (e.g., Jena and Sesame) that provide RDF data stores and support queries. But, none of them provide native support for spatial and temporal queries. The work described in Perry’s paper is aimed to address this problem.
In general, there are two different approach to this problem. First, we can design and implement a whole new RDF storage engine to support efficient spatial and temporal operations. Second, we can transform the problem into a typical relational database problem and solve it using a mix bag of RDF and RDBMS technology.