54
P.A. Bernstein, S. Melnik: Meta Data Management,
ICDE'04 Boston
mB¢
OrderID
Product
Brand
m
mA¢
OrderID
Product
Rebate
OrderID
Product
Discount
ShipDate
lComposition produces a partial mapping
?
m_mA ○ mA_mA¢
m_mB ○ mB_mB¢
Invert(m_mA ○ mA_mA¢) ○ m_mB ○ mB_mB¢
