Variante 1 (SDOK_MIMETYPE_GET)
DATA: lv_file_extension TYPE w3fileext VALUE 'pdf'.
DATA: lv_mime_type TYPE w3conttype.
CALL FUNCTION 'SDOK_MIMETYPE_GET'
EXPORTING
extension = lv_file_extension
IMPORTING
mimetype = lv_mime_type.
WRITE: / lv_mime_type.
Variante 2 (/IWWRK/CL_MGW_WORKFLOW_RT_UTIL)
DATA: lv_file_extension TYPE w3fileext VALUE 'pdf'. DATA(lv_mime_type) = /iwwrk/cl_mgw_workflow_rt_util=>get_mime_type_from_extension( CONV #( lv_file_extension ) ). WRITE: / lv_mime_type.