This module implements the Turtle language for representing the RDF triple model as defined by Dave Beckett from the Institute for Learning and Research Technology University of Bristol and later standardized by the W3C RDF working group.
This module acts as a plugin to rdf_load/2, for processing files with
one of the extensions .ttl
or .n3
.
rdf(Subject, Predicate, Object [, Graph])
The representation is consistent with the SWI-Prolog RDF/XML and ntriples parsers. Provided options are:
node(1)
, node(2)
, ...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.iri
.prefixes(Pairs)
. Compatibility to rdf_load/2.warning
(default), print the error and continue
parsing the remainder of the file. If error
, abort
with an exception on the first error encountered.on_error(warning)
is active, this option cane be
used to retrieve the number of generated errors.rdf(S,P,O)
terms for a normal Turtle file or rdf(S,P,O,G)
terms
if the GRAPH
keyword is used to associate a set of triples in
the document with a particular graph. The Graph argument
provides the default graph for storing the triples and Line is
the line number where the statement started.
call(OnObject, ListOfTriples, Graph:Line)
This predicate supports the same Options as rdf_load_turtle/3.
Errors encountered are sent to print_message/2, after which the parser tries to recover and parse the remainder of the data.
turtle_write_quoted_string(Out, Value, false)
, writing a
string with only a single "
. Embedded newlines are escapes
as \n
.<...>
The following predicates are exported, but not or incorrectly documented.