test_graph v0.1.0 TestGraph.RDF.SPARQL.Client
Module providing simple wrapper functions for the SPARQL.Client module.
Link to this section Summary
Functions
Sets DBpedia SPARQL endpoint
Sets local SPARQL endpoint
Queries a SPARQL endpoint with a SPARQL query
The same as rquery but raises a runtime error if it fails
Returns default SPARQL endpoint
Sets default SPARQL endpoint
Returns default SPARQL query
Returns saved SPARQL query
Returns SPARQL services
Sets Wikidata SPARQL endpoint
Link to this section Functions
Link to this function
dbpedia_sparql_endpoint()
Sets DBpedia SPARQL endpoint.
Examples
iex> dbpedia_sparql_endpoint()
"http://dbpedia.org/sparql"
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local_sparql_endpoint()
Sets local SPARQL endpoint.
Examples
iex> local_sparql_endpoint()
"http://localhost:7200/repositories/test-graph"
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rquery(query \\ sparql_query(), endpoint \\ sparql_endpoint())
Queries a SPARQL endpoint with a SPARQL query.
Examples
iex> sparql_endpoint
"http://localhost:7200/repositories/test-graph"
iex> sparql_endpoint(:sparql_dbpedia)
"http://dbpedia.org/sparql"
iex> read_rdf_query("hello.rq").data |> SPARQL_Client.rquery()
{:ok, #RDF.Graph{name: nil
~I<http://dbpedia.org/resource/Hello_World>
~I<http://www.w3.org/2000/01/rdf-schema#label>
~L"Hello World"en}}
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rquery!(query \\ sparql_query(), endpoint \\ sparql_endpoint())
The same as rquery but raises a runtime error if it fails.
Examples
iex> sparql_endpoint
"http://dbpedia.org/sparql"
iex> read_rdf_query("hello.rq").data |> SPARQL_Client.rquery()
#RDF.Graph{name: nil
~I<http://dbpedia.org/resource/Hello_World>
~I<http://www.w3.org/2000/01/rdf-schema#label>
~L"Hello World"en}
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sparql_endpoint()
Returns default SPARQL endpoint.
Examples
iex> sparql_endpoint()
"http://localhost:7200/repositories/test-graph"
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sparql_endpoint(sparql_service)
Sets default SPARQL endpoint.
Examples
iex> sparql_endpoint(:sparql_dbpedia)
"http://dbpedia.org/sparql"
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sparql_query()
Returns default SPARQL query.
Examples
iex> sparql_query()
"construct\n{ ?s ?p ?o }\nwhere {\n ?s ?p ?o\n} limit 1\n"
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sparql_query(query_file)
Returns saved SPARQL query.
Examples
iex> list_rdf_queries
["cypher.rq", "london.rq", "elixir.rq", "default.rq", "neo4j.rq",
"triples_by_uri.rq", "triples.rq", "hello.rq"]
iex> sparql_query("hello.rq")
"construct\n{ ?s ?p ?o }\nwhere {\n bind (<http://dbpedia.org/resource/Hello_World> as ?s)\n ?s ?p ?o\n filter (isLiteral(?o) && langMatches(lang(?o), \"en\"))\n}\n"
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sparql_services()
Returns SPARQL services.
Examples
iex> list_sparql_services()
[:sparql_dbpedia, :sparql_local, :sparql_wikidata]
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wikidata_sparql_endpoint()
Sets Wikidata SPARQL endpoint.
Examples
iex> wikidata_sparql_endpoint()
"https://query.wikidata.org/bigdata/namespace/wdq/sparql"