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
Health Warning:
This is going to be a pretentious talk
Philosophical confessioncoming 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 any Computing Science laws?
What have we built?
Let’s treat the last 10 yearsas a giant experiment
Some well known “laws” about information
do indeed apply
USE
USE
RE-USE
U = 1-R
Factual knowledge is a graph
Terminological knowledgeis a hierarchy
Terminological knowledgeis much smaller
than the factual knowledge
Dataset Schemaclosure
Full closure
Ratio
LUBM 8sec 1h15min 562Linked Life Data 332sec 1h5min 11FactForge 89sec 2h45min 111
Terminological knowledgeis of low complexity
heterogeneityis unavoidable
heterogeneityis solvable
socially,culturally,
economically (and a little bit algorithmically)
publication should be distributed,computation should be centralised
speed increases with parallelisation
0 2 4 6 8 100
5
10
15
20
25
30
35
Input size (billion triples)
Thro
ughp
ut (K
trip
les/
sec)
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
knowledge about knowledge
Finally:a call to arms
Theory?What theory?
Big thank you to:
Myria Nikolaidou&
Paul GrothAnnette ten TeijeStefan Schlobach
Christophe GueretEmanuele Della Valle
and all at the SemWeb@VUA group