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Phase 2

Phase 3 Output

Best plans Plan selection

Planning with QCAs with source- specifc criteria User Query,

IQ scores Input

Source selection

plans All correct

Best sources

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Quality-driven Integration of Heterogeneous Information Sources

genename (Gn) cDNAname (Dn)

annotation (An) origin (Or) sequence (Se) genename (Gn) disease (Di)

chromosome (Ch) position (Po) primer1 (P1) primer2 (P2) cDNA

Gene

cDNAcluster

Sequence cDNAname (Dn)

genename (Gn)

Wrapper Wrapper Wrapper

Mediator

Data source Data source

QCAs

QCAs

QCAs

SQL http CORBA

Phase 1

Phase 2

Phase 3 Output

Best plans Plan selection

Planning with QCAs with source- specifc criteria User Query,

IQ scores Input

Source selection

plans All correct

Best sources

with QCA- and attri- bute-specific criteria Sources with QCAs,

S S’

IQ dimension 2

2 4

2 4 6 8

0

Efficiency frontier

non-good sources

good sources

IQ dimension 1

QCA 2 QCA 6

QCA 7 (94.05,0,1,1,99.85,48,54.86,0)

(99,0,1,.2,99.9,80,52.8,0) (95,0,.7,1,99.95,60,48.2,0)

(95,0,.7,1,99.95,60,38,3) (89.35,0,1,1,99.8,28.8,76.06,3)

QCA ₂ QCA ₆

QCA ₇ (94.05,0,1,1,99.85,48,54.86,0)