Affects Version/s: Fuseki 2.0.0
Fix Version/s: None
According to the SPARQL 1.1 Query Language specification the set of named graphs must be empty if a query only specifies FROM clauses and no FROM NAMED clauses:
An RDF Dataset comprises ... zero or more named graphs
That means, the only way to express zero named graphs is to specify no FROM NAMED clause.
Having the following data:
and executing the query:
which proves that the set of named graphs is not empty:
GRAPH can ... use a variable which will range over the IRI of all the named graphs in the query's RDF dataset.