I've been considering writing a graph database on top of SPARQL and RDF. Beyond the official docs (which are pretty good), can you recommend any other resources for easily getting the hang of SPARQL?
can you recommend any other resources for easily getting the hang of SPARQL?
I'll second the recommendation of Jena (and associated sub-project Fuseki). If you know Java (or any JVM language) you can use the Jena API directly for manipulating the triplestore, and submitting SPARQL queries. If you don't want to do that, Fuseki exposes an HTTP based API that you can interact with from any environment you prefer.