org.mustangproject:library (maven): FOSS Java library to read, write and validate european electronic invoices and orders in the UN/CEFACT Cross Industry Invoice based formats Factur-X/ZUGFeRD, XRechnung and Order-X in your invoice PDFs. 
Keywords: e-rechnung|electronic-invoicing|factur-x|invoice|invoice-pdf|invoices|java|metadata|metadata-api|metadata-standard|pdf|ubl|xrechnung|zugferd