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.

Arguments:

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.