Every company needs to process and file vendor bills in different formats and from different channels. Some arrive via traditional mail, others as e-mail with PDF attachment. Recently international standards like UBL or Factur-X are used for information exchange: these are XML schemas consisting of all necessary tags for direct data access. XML files may be sent by e-mail or embedded in a PDF, even the other way round (PDF in XML). Regardless of all these differences Odoo CE extended by serveral OCA addons can read and process all these formats. The traditional variant uses Tesseract4 for text extraction via OCR.