95
P.A. Bernstein, S. Melnik: Meta Data Management,
ICDE'04 Boston
Merge(M1,
M2, map)
lReturn
the union of models M1 and M2
ØUse
map to guide the Merge
ØIf
elements x = y in map, then collapse them
into one element
Emp
Addr
Name
Emp
Name
Phone
map
=
Emp
Name
Phone
Addr
Þ