April 2016
Intermediate to advanced
386 pages
10h 3m
English
Content preview from Foundations of Fuzzy Logic and Semantic Web Languages
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Appendix G
Fuzzy SPARQL: a Query Language for
Fuzzy RDFS Graphs
The aim of this appendix is to introduce a fuzzy SPARQL, a fuzzy extension
of SPARQL that is compliant with the crisp variant described in Section 6.3.
G.1 Fuzzy SPARQL
Fuzzy SPARQL [476, 264] extends SPARQL allowing to query fuzzy RDFS
graphs.
A Fuzzy SPARQL has its counterpart in a generalization of fuzzy conjunc-
tive queries, which are of the general form
q(x, Λ, α, z) ← ∃y∃Λ
0
.ϕ(x, Λ, y, Λ
0
),
GroupedBy(w),
α:=@[f(z)],
OrderBy(z) .
The semantics is a straightforward extension of the one that has been
defined in Section 9.3 (see also [476]).
Now, the Fuzzy SPARQL query languages are defined as ...
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