SWI-Prolog -- rdf_db:rdf_open

Documentation
- Reference manual
- Packages
  - SWI-Prolog Semantic Web Library 3.0
    - Plugin modules for rdf_db
      - Hooks into the RDF library
        
        rdf_db:rdf_open_hook/3
        
        rdf_db:rdf_load_stream/3
        
        rdf_db:rdf_input_info/3
        
        rdf_db:rdf_file_type/2
        
        rdf_db:url_protocol/1

rdf_db:rdf_open_hook(+Input, -Stream, -Format)

Open an input. Input is one of file(+Name), stream(+Stream) or url(Protocol, URL). If this hook succeeds, the RDF will be read from Stream using rdf_load_stream/3. Otherwise the default open functionality for file and stream are used.