1791 search results - page 63 / 359 » Semantics and Complexity of SPARQL |
110
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CORR
2002
Springer
15 years 4 months ago
2002
Springer
We study xpoints of operators on lattices. To this end we introduce the notion of an approximation of an operator. We order approximations by means of a precision ordering. We sho...
126
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PODS
2006
ACM
16 years 4 months ago
2006
ACM
Query containment is a fundamental algorithmic problem in database query processing and optimization. Under set semantics, the query-containment problem for conjunctive queries ha...
163
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REST
2010
ACM
15 years 6 months ago
2010
ACM
In this article a formal model applying REST architectural principles to the description of semantic web services is introduced, including the discussion of its syntax and operati...
107
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TCS
2010
15 years 2 months ago
2010
We define a program semantics that is preserved by dependence-based slicing algorithms. It is a natural extension, to non-terminating programs, of the semantics introduced by Wei...
133
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ACL
2012
13 years 6 months ago
2012
Interpreting news requires identifying its constituent events. Events are complex linguistically and ontologically, so disambiguating their reference is challenging. We introduce ...