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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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#
# Process federation definitions from /data/demo/fedprofile.ttl
# Used in Profile.java
#

select * (aggregate(distinct ?url) as ?list) 
where {
  ?uri a st:Federation ;
    (owl:sameAs?/st:definition/rdf:rest*/rdf:first)+ ?url
  filter not exists { ?url a st:Federation }
}
group by ?uri