J Umbrich C Gutierrez A Hogan M Karnstedt J X Parreira Fujitsu Ireland Limited Dublin Ireland DCC Universidad de Chile Santiago Chile ID: 792883
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Slide1
A
Querying
the Web of
Data
J.
Umbrich
♥, C. Gutierrez ♦, A. Hogan ♣, M. Karnstedt ♣, J. X. Parreira ♣ ♥ Fujitsu (Ireland) Limited, Dublin, Ireland ♦ DCC, Universidad de Chile, Santiago, Chile ✉cgutierr@dcc.uchile.cl ♣ DERI Galway, NUI Galway, Ireland
A
This paper was part funded by Science Foundation Ireland under Grant No. SFI/08/CE/I1380
(Lion-2), Project
Fondecyt
1110287 & the European Commission with contract number FP720117287661 (GAMBAS).
Alignment
:
The
answers given by a query engine are correct and synchronised with respect to sources on the Web at the point when the query is issued.
Coverage: The answers given by a query engine are with respect to all sources available on the Web.
Efficiency: The query engine runs with bounded resources, encapsulating various dimensions such as machines, time, energy, parallelism, messages, ...
A
T
IMELINESS
VS
.
SPACE
T
IMELINESS VS.RESOURCES
S
PACEVS.RESOURCES
C
E
One
cannot
ACEthemall
A
C
E
A
C
E
A
C
E
Poster paper:
includes a
proof sketch
The
ACE
Theorem for
Fix
Efficiency
…
Fix
Coverage
…
Fix
Alignment
…