The (design) objective of XML is simplicity, uniformity and usability. In order for these invoices to be read by all computers worldwide, certain rules have been laid down on how an XML invoice must be constructed. This set of standard rules structure is called UBL. The most common form of UBL is UBL 2.0. For example, if a supplier who sends an XML invoice uses UBL 2.0, we know that the invoice date is always at the top. This has allowed us to create a standard mapping in the Spend Cloud where we say:

Receiving XML invoices is the same as receiving PDF invoices. The XML invoices are sent to the Spend Cloud Mailbox. From here you can either transfer the invoices manually to Encoding or through quick processing.
We recommend asking the creditor to send both the XML invoice and the PDF invoice in the same email. We can then use the PDF to visualise the invoice. To do this the filenames of these documents must be the same, for example:
Invoice_123456.PDF
Invoice_123456.XML