Line

Name	Type	Additional information
ref	string	None.
name	string	None.
type	string	None.
freight_term	string	None.
unit	string	None.
link_type	string	None.
currency	Currency	None.
currency_amount	string	None.
volume	string	None.
rate	string	None.
amount	string	None.
billing_code	BillingCode	None.
tax	Tax	None.