(Invoice header) order type code reference of the invoiced order. (registry indicate issuer of the order type code)

invoic_Examples
 <property name="orderType" registry="Supplier" code="Z003">At Once</property> 
invoic_XPATH

/b24Message/invoice/property[@name="orderType"]/@code

invoic_Required
No
invoic_Type
Text
invoic_Sort
3800