## set_mapping(Custom_xml_part, x_path, prefix_mapping) {#Customxmlpart_str_str} Sets a mapping between the parent structured document tag and an XML node of a Custom XML Data part. ```python def s......## set_mapping(custom_xml_part, x_path, prefix_mapping) {#cu...tag and an XML node of a custom XML data part. ```python def set_mapping(self...