- InvoiceNumber
- A principle identifier of a multi-page document. If the invoice number changes between two pages, a new document starts.
- Date
- Another criterion that can strengthen the determination of a multi-page document.
- Page
- This field must contain the page keyword, such as “Page” or “Pg.Nr.” to strengthen the page number extraction.
- PageNumber
- If the document has pagination, a new document can be recognized when the pagination starts over.
- SenderID
- The identifier of an invoice type. For example, you can use the tax number of the vendor to identify a unique invoice of multiple pages from the same vendor. If the SenderID changes between two pages, this signals that a new document start.