Hi @Erik Hofmann,
You can send like below.
1PROCEDURE Send_Personel_Info_To_Next4Biz(attr_ IN VARCHAR2) IS xml_ CLOB;BEGIN xml_ := xml_ || '<Fields>'; xml_ := xml_ || '<nmr_tckn>' || client_sys.get_item_value('TCKN', attr_) || '</nmr_tckn>'; xml_ := xml_ || '<nmr_sicil_no>' || client_sys.get_item_value('SICIL_NO', attr_) || '</nmr_sicil_no>'; IF client_sys.get_item_value('HAKEDILEN_IZIN', attr_) IS NOT NULL THEN xml_ := xml_ || '<txt_hakedilenizin>' || client_sys.get_item_value('HAKEDILEN_IZIN', attr_) || '</txt_hakedilenizin>'; END IF; IF client_sys.get_item_value('KULLANILAN_IZIN', attr_) IS NOT NULL THEN xml_ := xml_ || '<txt_kullanilanizin>' || client_sys.get_item_value('KULLANILAN_IZIN', attr_) || '</txt_kullanilanizin>'; END IF; IF client_sys.get_item_value('KALAN_IZIN', attr_) IS NOT NULL THEN xml_ := xml_ || '<txt_kalanizin>' || client_sys.get_item_value('KALAN_IZIN', attr_) || '</txt_kalanizin>'; END IF; xml_ := xml_ || '</Fields>'; ifsapp.plsql_rest_sender_api.call_rest_endpoint(rest_service_ => 'NEXT4BIZ_PERSONEL_AKTARMA', xml_ => xml_, key_ref_ => 'NEXT4BIZ_PERSONEL_AKTARMA', fnd_user_ => fnd_session_api.get_fnd_user(), callback_func_ => 'xxxxxxxxxx_api.next4biz_callback', http_method_ => 'POST', http_req_headers_ => 'Content-Type: application/xml', sender_ => 'IFS', subject_ => 'Next4Biz Personel Aktarma İsteği');END Send_Personel_Info_To_Next4Biz;