/* Example DATA step code for linguist */
libname source 'C:\path\to\file'
data work.working_copy;
set source.original_file.sas7bdat;
run;
data work.working_copy;
set work.working_copy;
if Purge = 1 then delete;
run;
data work.working_copy;
set work.working_copy;
if ImportantVariable = . then MissingFlag = 1;
run;