semantic web exploratory search dbpedia semantic spreading activation linked data discovery hub rdf search engines semantic social web spreading activation sioc foaf social object object centered social network gandon ocso ncmarie ribiere social web human evaluations linked data based exploratory search system multiperspective exploratory search state-of-the-art linked data recommenders semantic browsers survey exploratory search systems knowledge retrieval faceted search human computer interaction facebook graphs open graph protocol multidimensional social networks ocso ontology heterogeneous social networks ogp pervasive communication opo ocsn ecosystem ocsn object centeredsociality ontology inria ontology bell labs sociality object centered temps present histoire 20 web participatif rww journalisme ihtp ina web social journalism histoire web 20 history histoire immediate fr
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