Global-as-View(GAv (Previous approaches Mapping Mediated schema CD: ASIN, Title, Genre Artist: AsIN, name Source Source Source Source Source R1 R2 R3 R4 R5Global-as-View (GAV) (Previous approaches) Source Source Source Source Source R1 R2 R3 R4 R5 CD: ASIN, Title, Genre,… Artist: ASIN, name, … Mediated Schema Mapping: