Embed XML? PDF/A-3 format?

[AuspeXeu]

Is it possible to include an XML file when generating a PDF by using the PDF/A-3 format?

This would enable the generation of e-invoices source

[Seemeile]

you could use the pdfmake document's getStream (https://pdfmake.github.io/docs/0.1/getting-started/client-side/methods/#get-pdfkit-document-object-as-stream) method to access the underlaying pdfkit document. There were some approaches to enable pdf/a-3 compatibility there, see foliojs/pdfkit#369

pdfkit's release https://github.com/foliojs/pdfkit/releases/tag/v0.14.0 introduced official support for PDF/A-3a but it's not yet available in pdfmake. However, I guess the authors would be delighted if you open up a new PR for this. Good Luck 👍