Read BW infoobject technical data

function module to get data dict for attribute
   CALL FUNCTION 'RSD_DTELNM_GET_FOR_IOBJ'
                EXPORTING
                  i_iobjnm   = l_attrinm
                IMPORTING
                  e_dtelnm   = <l_s_attr_field>-dtel
                EXCEPTIONS
                  name_error = 1
                  OTHERS     = 2.

function module to get the details of a info object
  CALL FUNCTION 'DDIF_DTEL_GET'
                EXPORTING
                  name          = <l_s_attr_field>-dtel
                IMPORTING
                  dd04v_wa      = l_s_dd04v
                EXCEPTIONS
                  illegal_input = 1
                  OTHERS        = 2.