A non-standard operator to represent the nodes of a graph. It returns all nodes (subjects or objects) in the graph. https://www.w3.org/TR/sparql12-query/#defn_nodeSet
Optional
A non-standard operator to represent the nodes of a graph. It returns all nodes (subjects or objects) in the graph. https://www.w3.org/TR/sparql12-query/#defn_nodeSet