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Distributed query processing in the presence of blank nodes
Published on 2018-11-222595 Views
This paper demonstrates that the presence of blank nodes in RDF data represents a problem for distributed processing of SPARQL queries. It is shown that the usual decomposition strategies from the lit
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Presentation
Distributed Query Processing in the Presence of Blank Nodes00:00
Background: NNEC00:40
Query: Find extraction points/planned evac missions s. t. 01:30
Essentially an OBDI+ problem - 102:38
Essentially an OBDI+ problem - 1202:52
OBDI+ - 103:06
OBDI+ - 203:55
OBDI+ - 303:58
OBDI+ - 404:18
OBDI+ - 504:32
OBDI+ - 604:39
OBDI+ - 704:40
Discoveries04:43
The problem in a nutshell - 105:52
The problem in a nutshell -2 06:56
The problem in a nutshell - 307:11
The two horns of federation07:41
Plausible responses08:12
Taking option 3: Federation semantics08:32
Recap09:12
It does...09:36
Uh oh!10:05
Countermeasures - 110:54
Countermeasures - 211:13
Contrapositively11:48
Probe rejects subset12:33
All partitions below are disqualified - 112:58
All partitions below are disqualified - 213:33
Possibilities14:19