By Giuseppe Pirrò, Massimo Ruffolo, Domenico Talia (auth.), Stefano Spaccapietra (eds.)
The LNCS magazine on information Semantics is dedicated to the presentation of impressive paintings that, in a single method or one other, addresses study and improvement on concerns concerning info semantics. The scope of the magazine levels from theories aiding the formal definition of semantic content material to cutting edge domain-specific purposes of semantic wisdom. The magazine addresses researchers and complex practitioners engaged on the semantic net, interoperability, cellular info prone, information warehousing, wisdom illustration and reasoning, conceptual database modeling, ontologies, and synthetic intelligence.
Volume XII effects from a rigorous choice between 20 complete papers bought in keeping with a decision for contributions issued in July 2007. the amount is a distinct factor on Semantic information Warehousing.
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Extra info for Journal on Data Semantics XII
3298, pp. 698–712. Springer, Heidelberg (2004) SECCO: On Building Semantic Links in Peer-to-Peer Networks 35 21. : Ontology Matching. Springer, Heidelberg (2007) 22. : The Semantic Grid: Myth busting and bridge building. In: Proc. of ECAI 2004, Valencia, Spain, pp. 1129–1135 (2004) 23. : A Translation Approach to Portable Ontology Specifications. Knowledge Acquisition 5(2), 199–220 (1993) 24. : Piazza: Data Management Infrastructure for Semantic Web Applications. In: Proc. of WWW 2003, Budapest, Hungary, pp.
In: Proc. of OM 2006, Athens, Georgia, USA, pp. 181–191 (2006) Towards a Scalable Query Rewriting Algorithm in Presence of Value Constraints H. Jaudoin1 , F. -M. Petit2 , and F. Toumani3 1 2 University of Rennes, ENSSAT Lannion, IRISA, UMR6074 CNRS, France University of Lyon, INSA-Lyon, LIRIS, UMR5203 CNRS, F-69621, France 3 University of Clermont-Ferrand, LIMOS, UMR6158 CNRS, France Abstract. , individual names) to occur in intentional descriptions. e, sets of allowed values for attributes. Such constraints are very useful in practice enabling, for example, ﬁne-grained description of queries and views in integration systems and thus can be exploited to reduce the query processing cost.
Therefore, it is impossible to give the right age of individuals but it is possible to give a good idea about their ages. , an }”. For example, Towards a Scalable Query Rewriting Algorithm 39 with such a kind of constraints, it is possible to ask for documents dealing with only a list of speciﬁc topics, or food prepared with only certain ingredients. In this paper, we study the problem of rewriting queries using views in presence of value constraints both in the queries and in the views. The problem of rewriting queries using views, intensively investigated during the last decade [14,24], can be formally stated as follow: given a set of views V and a query Q, both expressed over a global schema S, the purpose is to reformulate Q into a query expression that uses only the views in V and is maximally contained in Q.