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Predicate rdf_portray_as/1
 rdf_portray_as(+Style) is det[private]
Set the style used to portray resources. Style is one of:
Write as NS:ID, compatible with what can be handed to the rdf predicates. This is the default.
Use quoted write of the full resource.
Write namespace followed by the label. This format cannot be handed to rdf/3 and friends, but can be useful if resource-names are meaningless identifiers.
This combines prefix:id with prefix:label, providing both human readable output and output that can be pasted into the commandline.