rdf_db:rdf_graph_prefixes/2

rdf_graph_prefixes(?Graph, -List:ord_set) is det

rdf_graph_prefixes(?Graph, -List:ord_set, :Options) is det

List is a sorted list of prefixes (namepaces) in Graph. Options defined are:

filter(:Filter)

optional Filter argument is used to filter the results. It is called with 3 additional arguments:

call(Filter, Where, Prefix, URI)

The Where argument gives the location of the prefix ans is one of subject, predicate, object or type. The Prefix argument is the potentionally new prefix and URI is the full URI that is being processed.

expand(:Goal)

Hook to generate the graph. Called using

call(Goal,S,P,O,Graph)

min_count(+Count)

Only include prefixes that appear at least N times. Default is 1. Declared prefixes are always returned if found at least one time.

get_prefix(:GetPrefix)

Predicate to extract the candidate prefix from an IRI. Default is iri_xml_namespace/2.