php - Create PDF/a-3 invoices -


i using tcpdf generate invoices in pdf/a1-b format. far know there no possibility generate pdf-a3 tcpdf. there possibility convert pdf/a-1b pdf/a-3? generating invoice.xml file , append invoice.pdf?

take @ slides zugferd: overview , you'll notice can't use invoice.xml. although pdf/a-1b file conforms pdf/a-3b, can't append xml file attachment.

you need name xml file zugferd-invoice.xml (not invoice.xml) , add xml associated file (/af) defining relationship alternative. need tell pdf level of zugferd you're conforming (basic, comfort, extended). done in xmp stream (the same place define file pdf/a-3).

i not aware of php libraries advanced enough achieve this. concept of associated files rather new, , zugferd introduced in 2014 in germany. english translation of spec dates january 2015. surprise me if popular php libraries pdf know zugferd.


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