Olaf Hartig

sparql linked data linkeddata linked data query link traversal based query execution rdf querying processing intro query semantics tutorial data cache caching linkeddata webofdata squin provenance webofdata trust research ldql theory response time resource description framework semantic web heuristics source ranking optimization query planning ltbqe execution process live exploration source selection theoretical foundations computability introduction access w3c prov-aq storage query optimization index query execution linkeddata webofdata trustworthiness trust provenance vocabulary linkeddata webofdata linkeddata squin sparql query webofdata linktraver provenance linkeddata rdf webofdata webdata qualit sfsw swcllib researchersmap tsparql eswc queryoptimization sqgm semantics rdfs webdata linked data trustworthiness query