Adding attachment does not create AF entry (PDF/A compliance)

[florianbepunkt]

Question

Description

Adding a file does not create the neccessary AF entry to pass PDF/A compliance checks.

Code sample

const doc = new PDFDocument({
  subset: "PDF/A-3a",
  pdfVersion: "1.7",
  size: "A4",
  tagged: true
})

doc.file(zugferdXML, {
  name: "zugferd-invoice.xml",
  description: "ZUGFeRD Invoice Data",
  creationDate: new Date(2020, 3, 1),
  modifiedDate: new Date(2020, 3, 1),
  type: "application/xml",
});

EDIT: I'm happy to work on this, but need some guidance on how to add catalogue objects.

Your environment

• pdfkit version: "0.15.0
• Node version: v20.11.1
• Browser version (if applicable):
• Operating System:

[florianbepunkt]

I'm not familiar with the internal workings of this lib, but to achieve PDF/A compliance, two things would need to happen:

1.

pdfkit/lib/mixins/attachments.js

Line 86 in 2554c08

const fileSpecBody = {

This would need to be extended to accept a AFRelationship property:

    const fileSpecBody = {
      Type: 'Filespec',
      AFRelationship: "Alternative", // AFAIK this can be Source or Alternative, must be use-supplied, possibly as an argument in doc.file() options
      F: new String(options.name),
      EF: {
        F: ref
      },
      UF: new String(options.name)
    };

2.

The fileSpec must be added to the catalogue – not sure how this is done in this lib. But the catalogue currently has entries for Names and Pages. Here a list with the key of AF would need to be added, which hold the fileSpecBody.

[florianbepunkt]

Superseded by #1561