I am trying to understand how does following lines of code create a number of data sets.  data _null_; if "&sysscp"="WIN" then do; call symputx('rawdata',"&path\"); end; else do; call symputx('rawdata',"&path/"); end; run; And after these lines, obviously there many data sets written using SAS code including formats and lengths and so on. How does the above code generates complete data sets and puts them in a particular folder. Could anyone please tell me the whole process behind it ? How does these macro lines run at execution time.?     data library_name.a1; attrib Supplier_ID length=8 label='Supplier ID' format=12.; attrib Supplier_Name length=$30 label='Supplier Name'; attrib Street_ID length=8 label='Street ID' format=12.; attrib Supplier_Address length=$45 label='Supplier Address'; attrib Sup_Street_Number length=$8 label='Supplier Street Number'; attrib Country length=$2 label='Country'; infile datalines dsd; input Supplier_ID Supplier_Name Street_ID Supplier_Address Sup_Street_Number Country ; datalines4; 50,Scandinavian Clothing A/S,6850100389,Kr. Augusts Gate 13,13,NO 109,Petterson AB,8500100286,Blasieholmstorg 1,1,SE 316,Prime Sports Ltd,9250103252,9 Carlisle Place,9,GB 755,Top Sports,3150108266,Jernbanegade 45,45,DK 772,AllSeasons Outdoor Clothing,9260115819,553 Cliffview Dr,553,US 798,Sportico,8300100454,C. Barquillo 1,1,ES 1280,British Sports Ltd,9250100844,85 Station Street,85,GB 1303,Eclipse Inc,9260107621,1218 Carriole Ct,1218,US ;;;; run; and many more data sets like this . But before doing all this following code must run successfully. %let path=FILEPATH; libname library_name "&path"; ... View more