SWI-Prolog -- rdf_read

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

Read a stream or file into a set of triples or quadruples (if faced with TRiG input) of the format

rdf(Subject, Predicate, Object [, Graph])

The representation is consistent with the SWI-Prolog RDF/XML and ntriples parsers. Provided options are:

base_uri(+BaseURI): Initial base URI. Defaults to file://<file> for loading files.
anon_prefix(+Prefix): Blank nodes are generated as <Prefix>1, <Prefix>2, etc. If Prefix is not an atom blank nodes are generated as node(1), node(2), ...
format(+Format): One of auto (default), turtle or trig. The auto mode switches to TRiG format of there is a { before the first triple. Finally, of the format is explicitly stated as turtle and the file appears to be a TRiG file, a warning is printed and the data is loaded while ignoring the graphs.
resources(URIorIRI): Officially, Turtle resources are IRIs. Quite a few applications however send URIs. By default we do URI->IRI mapping because this rarely causes errors. To force strictly conforming mode, pass iri.
prefixes(-Pairs): Return encountered prefix declarations as a list of Alias-URI
namespaces(-Pairs): Same as prefixes(Pairs). Compatibility to rdf_load/2.
base_used(-Base): Base URI used for processing the data. Unified to [] if there is no base-uri.
on_error(+ErrorMode): In warning (default), print the error and continue parsing the remainder of the file. If error, abort with an exception on the first error encountered.
error_count(-Count): If on_error(warning) is active, this option cane be used to retrieve the number of generated errors.

Input is one of stream(Stream), atom(Atom), a http, https or file url or a filename specification as accepted by absolute_file_name/3.