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Corese is a Semantic Web Factory (triple store and SPARQL endpoint) implementing RDF, RDFS, SPARQL 1.1 Query and Update.

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#
# Turtle Pretty Printer
# Olivier Corby, Wimmics Inria I3S, 2013
#
template {
  if (?refer, concat(st:turtle(?in), " "), "[")
  
  ibox {
	st:call-template(st:value, ?in)
  } 
      
  if (?refer, " .", 
  if (?nested, "]", "] ."))
}
where {
  ?in ?p ?y   
  filter isBlank(?in)
  filter not exists { ?in rdf:first ?e } 
    
  bind (exists { ?a ?q ?in } as ?nested)
  
  bind (
    ?nested 
    && (
    (st:get(st:allgraph, true) && coalesce(st:cget(st:refer, ?in), false) )
    #exists { ?a ?q ?in . ?b ?r ?in filter(?a != ?b) })
	|| exists { ?in ?q ?in }
       )
  as ?refer)
  
}
limit 1