Data based on @zazuko/rdf-vocabularies
Defined by sd:
Click to Copysd:UnionDefaultGraph
Click to Copyhttp://www.w3.org/ns/sparql-service-description#UnionDefaultGraph
Union Default Graph
sd:UnionDefaultGraph, when used as the object of the sd:feature property, indicates that the default graph of the dataset used during query and update evaluation (when an explicit dataset is not specified) is comprised of the union of all the named graphs in that dataset.