Reads UBL 2.1 invoices and credit notes and UN/CEFACT CII D16B invoices into ESJ documents, and writes an ESJ document back as the XR representation. The syntax knowledge is not this module's: the documents are first transformed into the semantic XR representation by the stylesheets of the KoSIT XRechnung visualization, and only the business term identifiers of that representation are mapped to semantic paths.