SWI-Prolog -- rdf

Documentation
- Reference manual
- Packages
  - SWI-Prolog Semantic Web Library 3.0
    - Two RDF APIs
      - library(semweb/rdf11): The RDF database
        
        Modifying the RDF store
        
        rdf_assert/3
        
        rdf_assert/4
        
        rdf_retractall/3
        
        rdf_retractall/4
        
        rdf_create_bnode/1

Availability::- use_module(library(semweb/rdf11)).

[det]rdf_assert(+S, +P, +O)

[det]rdf_assert(+S, +P, +O, +G)

Assert a new triple. If O is a literal, certain Prolog terms are translated to typed RDF literals. These conversions are described with rdf_canonical_literal/2.

If a type is provided using Value^^Type syntax, additional conversions are performed. All types accept either an atom or Prolog string holding a valid RDF lexical value for the type and xsd:float and xsd:double accept a Prolog integer.

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

[det]rdf_assert(+Subject, +Predicate, +Object, +Graph)

As rdf_assert/3, adding the predicate to the indicated named graph.

Graph

is either the name of a graph (an atom) or a term Graph:Line, where Line is an integer that denotes a line number.