An aggregate reference resolves into a reference to a structured
  data item (a record structure or substructure).  For example:

  Data Declarations:

     STRUCTURE /STRA/
         INTEGER  INTFLD, INTFLDARY (10)
     END STRUCTURE
       . . .
     STRUCTURE /STRB/
         CHARACTER*20  CHARFLD
         INTEGER  INTFLD, INTFLDARY (10)
         STRUCTURE STRUCFLD
             COMPLEX  CPXFLD, CPXFLDARY (10)
         END STRUCTURE
         RECORD  /STRA/  RECFLD, RECFLDARY (10)
     END STRUCTURE
       . . .
     RECORD  /STRB/  REC, RECARY (10)

  Reference Examples:

     REC --- A record name
     RECARY(1) --- A record array reference
     REC.RECFLD --- A reference to a substructure
     REC.RECFLDARY(1) --- A reference to a substructure array element
     RECARY(1).RECFLD --- A reference to a substructure in a record
       array element
     RECARY(1).RECFLDARY(1) --- A reference to a substructure array
       element in a record array