Exploring Graphs with Elixir

Querying a Remote RDF Service

Let’s try querying a remote RDF graph store. We’re going to use DBpedia^[71] and the DBpedia SPARQL endpoint^[72] for our remote querying. So, we use the rdf_store/1 function we defined in the RDFGraph module with the atom :dbpedia as our key:

iex> rdf_store :dbpedia
:ok

Now if we check with the graph_info/0 function, we don’t get a %GraphCommons.Service.GraphInfo{} struct returned as we would with a local graph store, but instead we get a tuple returning the store token:

iex> graph_info
{:ok, :dbpedia}

Note that later in ​A Graph-to-Graph Example​, we’ll also be querying against Wikidata^[73] and using the Wikidata SPARQL endpoint.^[74]

DBpedia vs. Wikidata
	DBpedia and Wikidata are two related ...