How to use BAPI_QUALNOT_CREATE to create defects?

Hi,

    I want to call BAPI_QUALNOT_CREATE to create defects from a external system. But i don't know the means of parameters .

       CALL FUNCTION 'BAPI_QUALNOT_CREATE'

      EXPORTING

•         EXTERNAL_NUMBER          =

        notif_type               = notify_type

        notifheader              = notifyheader

•         TASK_DETERMINATION       = ' '

•         SENDER                   =

     IMPORTING

       notifheader_export       = notifyheader_export

     TABLES

       notitem                  = notifitem

•         NOTIFCAUS                =

•         NOTIFACTV                =

•         NOTIFTASK                =

•         NOTIFPARTNR              =

•         LONGTEXTS                =

•         KEY_RELATIONSHIPS        =

       return                   = return        .

Is there anyone can tell me what are these parameters' mean of  BAPI2078_NOTHDRI-REFOBJECTTYPE ,BAPI2078_NOTHDRI-REFOBJECTKEY , BAPI2078_NOTHDRI-REFRELTYPE.

I will appreciate If you provide me an example