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P.A. Bernstein, S. Melnik: Meta Data Management, ICDE'04 Boston
Mapping Composition
lDesign pattern – Compose two given mappings
M1
M2
map12
M3
map23
map13
lApplications
ØProcessing queries on views
lSolution templates
Ømap13 = Compose(map12, map23)
ØAnswering queries using views (LaV), 
Query modification (GaV), GLaV