Position 23 (Type of Data Structure)

Free-Form Syntax	S PSDS keyword. U *AUTO parameter for the DTAARA keyword.

This entry is used to identify the type of data structure being defined. If a data structure is not being defined, this entry must be left blank.

Entry : Explanation

Blank : The data structure being defined is not a program status or data-area data structure; or a data structure is not being defined on this specification

S : Program status data structure. Only one data structure may be designated as the program status data structure.

U : Data-area data structure.

RPG IV retrieves the data area at initialization
and rewrites it at end of program.

* If the DTAARA keyword is specified, the parameter to the DTAARA
  keyword is used as the name of the external data area. If the name is a variable,
  the value must be set before the program begins. This can be done by:
  + Passing the variable as a parameter.
  + Explicitly initializing the variable with the INZ keyword.
  + Sharing the variable with another module using the IMPORT and EXPORT |keywords,
    and ensuring the value is set prior to the call.
* If the DTAARA keyword is not specified, the name in positions 7-21 is
  used as the name of the external data area.
* If a name is not specified either by the DTAARA keyword, or by positions
  7-21, \*LDA (the local data area) is used as the name of the external data
  area.