There are various European standards for embedding XML data into PDFs to make data extraction easier. Think of commercial invoices that need to be both human re

There are various European standards for embedding XML data into PDFs to make data extraction easier. Think of commercial invoices that need to be both human readable and easily imported into ERP systems. The French standard is called Factur-X. The German one ZUGFeRD. More details here: https://www.pdflib.com/pdf-knowledge-base/zugferd-and-factur-x/ https://www.pdflib.com/pdf-knowledge-base/zugferd-and-factur...