@prefix foaf: . @prefix ns1: . @prefix ns2: . ns1:ian-horrocks foaf:made ns2:demo-73 . ns1:arild-waaler foaf:made ns2:demo-73 . ns1:martin-giese foaf:made ns2:demo-73 . ns1:dmitriy-zheleznyakov foaf:made ns2:demo-73 . ns1:evgeny-kharlamov foaf:made ns2:demo-73 . @prefix rdf: . @prefix owl: . ns2:demo-73 rdf:type owl:Thing . @prefix rdfs: . ns2:demo-73 rdf:type rdfs:Resource . @prefix ns6: . ns2:demo-73 rdf:type ns6:InProceedings ; rdfs:label "KeywDB: A System for Keyword-Driven Ontology-to-RDB Mapping Construction" . @prefix ns7: . ns2:demo-73 owl:sameAs ns7:demo-73 . @prefix dc: . ns2:demo-73 dc:creator ns1:vidar-klungre , ns1:dag-hovland , ns1:martin-giese , ns1:evgeny-kharlamov , ns1:arild-waaler , , ns1:ian-horrocks , ns1:dmitriy-zheleznyakov ; foaf:maker ns1:dmitriy-zheleznyakov , ns1:dag-hovland , ns1:evgeny-kharlamov , ns1:vidar-klungre , ns1:ian-horrocks , ns1:arild-waaler , ns1:martin-giese , ; ns6:abstract "In ontology-based data access (OBDA) the users access relational databases (RDBs) via ontologies that mediate between the users and the data. Ontologies are connected to data via declarative ontology-to-RDB mappings that relate each ontological term to an SQL query. In this demo we present our system KeywDB that facilitates construction of ontology-to-RDB mappings in an interactive fashion. In KeywDB users provide examples of entities for classes that require mappings and the system returnes a ranked list of such mappings. In doing so KeywDB relies on techniques for keyword query answering over RDBs. During the demo the attendees will try KeywDB with NorthWind and NPD FP databases and collections of mappings that we prepare." . @prefix ns9: . ns2:demo-73 ns6:hasAuthorList ns9:authorList . @prefix ns10: . ns2:demo-73 ns6:isPartOf ns10:proceedings . @prefix xsd: . ns2:demo-73 ns6:keyword "OBDA"^^xsd:string , "Keywords"^^xsd:string , "Mapping construction"^^xsd:string ; ns6:title "KeywDB: A System for Keyword-Driven Ontology-to-RDB Mapping Construction" . ns1:dag-hovland foaf:made ns2:demo-73 . ns1:vidar-klungre foaf:made ns2:demo-73 . ns10:proceedings ns6:hasPart ns2:demo-73 . foaf:made ns2:demo-73 .