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The predicates below enumerate the basic objects of the RDF store. Most of these predicates also enumerate objects that are not associated to any currently visible triple. Objects are retained as long as they are visible in active queries or snapshots. After that, some are reclaimed by the RDF garbage collector, while others are never reclaimed.
This predicate is primarily intended as a way to process all resources without processing resources twice. The user must be aware that some of the returned resources may not appear in any visible triple.
Note that resources that have
are not automatically included in the result-set of this predicate,
while all resources that appear as the second argument of a
triple are included.