SWI-Prolog -- rdf_update

Documentation
- Reference manual
- Packages
  - SWI-Prolog Semantic Web Library 3.0
    - Two RDF APIs
      - library(semweb/rdf_db): The RDF database
        
        Memory management considerations
        
        rdf_set/1
        
        rdf_gc/0
        
        rdf_update_duplicates/0

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

Update the duplicate administration of the RDF store. This marks every triple that is potentionally a duplicate of another as duplicate. Being potentially a duplicate means that subject, predicate and object are equivalent and the life-times of the two triples overlap.

The duplicates marks are used to reduce the administrative load of avoiding duplicate answers. Normally, the duplicates are marked using a background thread that is started on the first query that produces a substantial amount of duplicates.