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 | Predicate rdf_update_duplicates/0 |
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:- use_module(library(semweb/rdf_db)).- rdf_update_duplicates is det
- 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.
- rdf_update_duplicates is det
- Update the duplicate administration. If this adminstration is
up-to-date, each triples that may have a duplicate is flagged.
The predicate rdf/3 uses this administration to speedup checking
for duplicate answers.
This predicate is normally executed from a background thread named =__rdf_duplicate_detecter= which is created when a query discovers that checking for duplicates becomes too expensive.