The relational model with relation-valued attributes
Information Systems
CLASSIC: a structural data model for objects
SIGMOD '89 Proceedings of the 1989 ACM SIGMOD international conference on Management of data
Query expansion using lexical-semantic relations
SIGIR '94 Proceedings of the 17th annual international ACM SIGIR conference on Research and development in information retrieval
The anatomy of a large-scale hypertextual Web search engine
WWW7 Proceedings of the seventh international conference on World Wide Web 7
Data integration using similarity joins and a word-based information representation language
ACM Transactions on Information Systems (TOIS)
Modern Information Retrieval
A system for principled matchmaking in an electronic marketplace
WWW '03 Proceedings of the 12th international conference on World Wide Web
A semantic approach to approximate service retrieval
ACM Transactions on Internet Technology (TOIT)
Semantic specification and evaluation of bids in web-based markets
Electronic Commerce Research and Applications
Semantic Process Retrieval with iSPARQL
ESWC '07 Proceedings of the 4th European conference on The Semantic Web: Research and Applications
A Framework for the Partial Evaluation of SPARQL Queries
SUM '08 Proceedings of the 2nd international conference on Scalable Uncertainty Management
WSMO-MX: A hybrid Semantic Web service matchmaker
Web Intelligence and Agent Systems
The fundamentals of iSPARQL: a virtual triple approach for similarity-based semantic web tasks
ISWC'07/ASWC'07 Proceedings of the 6th international The semantic web and 2nd Asian conference on Asian semantic web conference
Journal on data semantics X
A comparative evaluation of semantic web service discovery approaches
Proceedings of the 12th International Conference on Information Integration and Web-based Applications & Services
A relaxed approach to RDF querying
ISWC'06 Proceedings of the 5th international conference on The Semantic Web
Querying the semantic web with preferences
ISWC'06 Proceedings of the 5th international conference on The Semantic Web
An agent based network resource planner for workflow applications
Multiagent and Grid Systems - Agent Based Computing: From Model to Implementation
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Traditional semantic web query languages support a logic-based access to the semantic web. They offer a retrieval (or reasoning) of data based on facts. On the traditional web and in databases, however, exact querying often provides an incomplete answer as queries are overspecified or the mix of multiple ontologies/modelling differences requires "interpretational flexibility." Therefore, similarity measures or ranking approaches are frequently used to extend the reach of a query. This paper extends this idea to the semantic web. It introduces iRDQL---a semantic web query language with support for similarity joins. It is an extension of traditional RDQL (RDF Data Query Language) that enables the users to query for similar resources ranking the results using a similarity measure. We show how iRDQL allows to extend the reach of a query by finding additional results. We quantitatively evaluated four similarity measures for their usefulness in iRDQL in the context of an OWL-S semantic web service retrieval test collection and compared the results to a specialized OWL-S matchmaker. Initial results of iRDQL indicate that it is indeed useful for extending the reach of queries and that it is able to improve recall without overly sacrificing precision. We also found that our generic iRDQL approach was only slightly outperformed by the specialized algorithm.