health warning: this is going to be a pretentious talk
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Health Warning: This is going to be a pretentious talk. Philosophical confession coming up: What I believe about scientific knowledge. Laws about the information universe, just like laws about the physical universe. alchemy. Did a decade of Semantic Web work help to discover - PowerPoint PPT PresentationTRANSCRIPT
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Health Warning:
This is going to be a pretentious talk
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Philosophical confessioncoming up:
What I believe about scientific knowledge
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Laws about the information universe,
just like laws about the physical universe
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alchemy
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Did a decade of Semantic Web work
help to discover any Computing Science laws?
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What have we built?
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Let’s treat the last 10 yearsas a giant experiment
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Some well known “laws” about information
do indeed apply
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USE
USE
RE-USE
U = 1-R
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Factual knowledge is a graph
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Terminological knowledgeis a hierarchy
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Terminological knowledgeis much smaller
than the factual knowledge
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Dataset Schemaclosure
Full closure
Ratio
LUBM 8sec 1h15min 562Linked Life Data 332sec 1h5min 11FactForge 89sec 2h45min 111
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Terminological knowledgeis of low complexity
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heterogeneityis unavoidable
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heterogeneityis solvable
socially,culturally,
economically (and a little bit algorithmically)
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publication should be distributed,computation should be centralised
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speed increases with parallelisation
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0 2 4 6 8 100
5
10
15
20
25
30
35
Input size (billion triples)
Thro
ughp
ut (K
trip
les/
sec)
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0 10 20 30 40 50 60 70 80 90 100 1100
100200300400500600700800900
10001100120013001400150016001700180019002000
Input size (billion triples)
Thro
ughp
ut (K
Trip
les/
sec)
in 2011
in 2010
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knowledge about knowledge
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Finally:a call to arms
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Theory?What theory?
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Big thank you to:
Myria Nikolaidou&
Paul GrothAnnette ten TeijeStefan Schlobach
Christophe GueretEmanuele Della Valle
and all at the SemWeb@VUA group