1 INTRODUCTION  
2 DATA  
3 RADIAL AND VERTICAL GRADIENTS OF [FE/H] AND [α/FE]  
4 PROFILES OF THE [FE/H] AND [α/FE] DISTRIBUTIONS  
5 IMPACTS OF RADIAL MIGRATION ON THE METALLICITY DISTRIBUTION FUNCTION  
6 CONSTRAINING THE FORMATION AND EVOLUTION OF THE DISC(S)  
7 SUMMARY