Program described data structure rpgle. They're described in the ILE RPG language reference. May 18, 2016 · Lines 7 – 10: This is the Program data structure. Introduction to Program Status Data Structure It is identified by the PSDS keyword for a free form definition or S specified in 23 positions in fixed format RPG. Declaring an externally described data structure allows you to use any of the information in the program status data structure without worrying about sub-field locations. One data structure can be defined like another using the LIKEDS keyword. Externally described Data Structures An externally described data structure in RPG is a data structure whose definition is stored in an external file. The working program populates fields defined in an externally described file as brought in from the compiler. Subfields can also be declared using the LIKEREC keyword which in itself becomes data structure. Line 11: I am have defined this indicator variable as its name clearly states its purpose. Name or Vendor.