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Erschienen in:
2012 | OriginalPaper | Buchkapitel
Provenance for SPARQL Queries
verfasst von : Carlos Viegas Damásio, Anastasia Analyti, Grigoris Antoniou
Erschienen in: The Semantic Web – ISWC 2012
Verlag: Springer Berlin Heidelberg
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Determining trust of data available in the Semantic Web is fundamental for applications and users, in particular for linked open data obtained from SPARQL endpoints. There exist several proposals in the literature to annotate SPARQL query results with values from abstract models, adapting the seminal works on provenance for annotated relational databases. We provide an approach capable of providing provenance information for a large and significant fragment of SPARQL 1.1, including for the first time the major non-monotonic constructs under multiset semantics. The approach is based on the translation of SPARQL into relational queries over annotated relations with values of the most general m-semiring, and in this way also refuting a claim in the literature that the
OPTIONAL
construct of SPARQL cannot be captured appropriately with the known abstract models.