The main documentation of the Set_Version_Overlapped_Vector Procedure contains additional explanation of this code listing.
subroutine Set_Version_Overlapped_Vector (OV, Version) ! Input variable. type(integer), intent(in) :: Version ! Version number. ! Input/Output variable. type(Overlapped_Vector_type), intent(inout) :: OV ! Variable to be set. !~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ! Verify requirements. VERIFY(Valid_State(OV),5) ! OV is valid. ! Set the value. OV%Version = Version ! Verify guarantees - none. return end subroutine Set_Version_Overlapped_Vector