By Abraham Bernstein (auth.), Elena Simperl, Philipp Cimiano, Axel Polleres, Oscar Corcho, Valentina Presutti (eds.)
This publication constitutes the refereed court cases of the ninth prolonged Semantic internet convention, ESWC 2012, held in Heraklion, Crete, Greece, in could 2012. The fifty three revised complete papers awarded have been conscientiously reviewed and chosen from 212 submissions. they're equipped in tracks on associated open information, computer studying, ordinary language processing and data retrieval, ontologies, reasoning, semantic info administration, companies, techniques, and cloud computing, social internet and net technology, in-use and commercial, electronic libraries and cultural background, and e-government. The publication additionally comprises thirteen PhD papers provided on the PhD Symposium.
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Additional info for The Semantic Web: Research and Applications: 9th Extended Semantic Web Conference, ESWC 2012, Heraklion, Crete, Greece, May 27-31, 2012. Proceedings
Adoc is a partial, surjective mapping adoc : U → D. While the three elements D, data, and adoc completely define a Web of Linked Data in our model, we point out that these elements are abstract concepts and, thus, are not available to a query execution system. However, by retrieving LD documents, such a system may gradually obtain information about the Web. Based on this information the system may (partially) materialize these three elements. In the following we discuss the three elements and introduce additional concepts that we need to define queries.
We now discuss computability. Since all non-satisfiable SPARQLLD queries are finitely computable (recall Fact 1), we focus on satisfiable SPARQLLD queries. Our first main result shows that the computability of such queries depends on their monotonicity: Theorem 1. If a satisfiable SPARQLLD query is monotonic, then it is eventually computable (but not finitely computable); otherwise, it is not even eventually computable. In addition to a direct dependency between monotonicity and computability, Theorem 1 shows that not any satisfiable SPARQLLD query is finitely computable; instead, such queries are at best eventually computable.
Identification of the potential solvers and broadcasting problems to their attention is already used by the Web innovation platforms to boost the problem-solving activity . , blogs, publications, presentations) available in Linked Data. However, finding the users with expertise in the problem topics is often not good enough, as Web innovation platforms also seek a greater diversity in solutions in terms of domains of knowledge that they are coming from, as well as in terms of different perspectives on the problem.
The Semantic Web: Research and Applications: 9th Extended Semantic Web Conference, ESWC 2012, Heraklion, Crete, Greece, May 27-31, 2012. Proceedings by Abraham Bernstein (auth.), Elena Simperl, Philipp Cimiano, Axel Polleres, Oscar Corcho, Valentina Presutti (eds.)