SDF - technical definition

(Standard Data Format) A simple file format that uses fixed length fields. It is commonly used to transfer data between different programs.

   SDF

   Pat Smith     5 E. 12 St.       Rye         NY
   Bob Jones     200 W. Main St.   Palo Alto   CA

   Comma delimited

   "Pat Smith","5 E. 12 St.","Rye","NY"
   "Bob Jones","200 W. Main St.","Palo Alto","CA"