- 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’? 
This module defines rules for user: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:
- [det]rdf_portray_as(+Style)
 - 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.
 
 
- [det]rdf_portray_lang(+Lang)
 - 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.