Querying the Semantic Web: A Formal Approach
ISWC '02 Proceedings of the First International Semantic Web Conference on The Semantic Web
Hybrid search: effectively combining keywords and semantic searches
ESWC'08 Proceedings of the 5th European semantic web conference on The semantic web: research and applications
ESWC 2009 Heraklion Proceedings of the 6th European Semantic Web Conference on The Semantic Web: Research and Applications
Combining information from multiple search engines-Preliminary comparison
Information Sciences: an International Journal
Ad-hoc object retrieval in the web of data
Proceedings of the 19th international conference on World wide web
Lightweight integration of IR and DB for scalable hybrid search with integrated ranking support
Web Semantics: Science, Services and Agents on the World Wide Web
Cross-language hybrid keyword and semantic search
ER'12 Proceedings of the 31st international conference on Conceptual Modeling
Searching and Generating Authoring Information: A Hybrid Approach
International Journal of Information Technology and Web Engineering
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The Web contains a large amount of documents and increasingly, also semantic data in the form of RDF triples. Many of these triples are annotations that are associated with documents. While structured query is the principal mean to retrieve semantic data, keyword queries are typically used for document retrieval. Clearly, a form of hybrid search that seamlessly integrates these formalisms to query both documents and semantic data can address more complex information needs. In this paper, we present CE2, an integrated solution that leverages mature database and information retrieval technologies to tackle challenges in hybrid search on the large scale. For scalable storage, CE2 integrates database with inverted indices. Hybrid query processing is supported in CE2 through novel algorithms and data structures, which allow for advanced ranking schemes to be integrated more tightly into the process. Experiments conducted on Dbpedia and Wikipedia show that CE2 can provide good performance in terms of both effectiveness and efficiency.