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rdf_portray.pl -- Portray RDF resources
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This module defines rules for portray/1 to help tracing and debugging RDF resources by printing them in a more concise representation and optionally adding comment from the label field to help the user interpreting the URL. The main predicates are:

To be done
- Define alternate predicate to use for providing a comment
- Use rdf:type if there is no meaningful label?
- Smarter guess whether or not the local identifier might be meaningful to the user without a comment. I.e. does it look `word-like'?
Source rdf_portray_as(+Style) is det
Set the style used to portray resources. Style is one of:
prefix:id
Write as NS:ID, compatible with what can be handed to the rdf predicates. This is the default.
writeq
Use quoted write of the full resource.
prefix:label
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.
prefix:id=label
This combines prefix:id with prefix:label, providing both human readable output and output that can be pasted into the commandline.
Source rdf_portray_lang(+Lang) is det
If Lang is a list, set the list or preferred languages. If it is a single atom, push this language as the most preferred language.