Unknown element LineID when parsing Factur-X EXTENDED invoice with InvoiceReferencedDocument

[timounger]

Description

When parsing a valid Factur-X EXTENDED invoice with Document.parse(), the following error is raised:

TypeError: Unknown element {urn:un:unece:uncefact:data:standard:ReusableAggregateBusinessInformationEntity:100}LineID

The XML is valid against the official Factur-X 1.0.8 EXTENDED XSD schema FACTUR-X_EXTENDED.xsd.

Example:

factur-x.xml

Root cause

In drafthorse/models/references.py, the classes InvoiceReferencedDocument (line 59) and InvoiceSpecifiedReferencedDocument (line 67) are missing the line_id field, although LineID is a valid optional sub-element according to the Factur-X EXTENDED specification.

All other Line*ReferencedDocument classes in the same file already define this field, e.g. LineBuyerOrderReferencedDocument (line 95):

class LineBuyerOrderReferencedDocument(ReferencedDocument):
    line_id = StringField(NS_RAM, "LineID", required=False, profile=COMFORT)
    ...