Querying#
Once RDF data is loaded, the next question is how to ask things of it. SPARQL is the query language of the RDF stack, and rudof runs it both against a graph it holds in memory and against remote endpoints. The second chapter here is about those endpoints themselves: a service description is the RDF document an endpoint publishes to say what it can do, which is how you find out what a query against it is allowed to assume.