SWI-Prolog -- read

Availability::- use_module(library(semweb/rdf_ntriples)).

[det]read_nquad(+Stream, -Quad)

Read the next quad from Stream as Quad. Stream must have UTF-8 encoding.

Quad is a term quad(Subject,Predicate,Object,Graph). Arguments follow the normal conventions of the RDF libraries. NodeID elements are mapped to node(Id). If end-of-file is reached, Quad is unified with end_of_file.

Errors: syntax_error(Message) on syntax errors