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An update on PDF errata

CTO Peter Wyatt summarizes key takeaways from the first two years of the PDF specification’s public errata process.

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PDF 2.0 and ISO 19445 XMP metadata for image and document proofing

How ISO 19445 might be used with PDF 2.0 and related technology updates relevant to the graphic arts industry.

XMP metadata


PDF 2.0 modernizes cryptographic support

ISO TC 171 SC 2 is publishing new extensions and clarifications to PDF 2.0 in support of advanced cryptography.

PDF 2.0 security shield with crypto terms surrounding it


Quirks of PDF public-key encryption

A commentary on the interoperability of encrypting PDF documents with public-key cryptography.

Figurative depiction of cryptography with hands and a phone.


How are signers identified?

Identifying the signer’s key in a PDF signature: how does that work?

People exchange credentials.


How to optimally prepare PDF files for variable data printing

Dietrich von Seggern from callas software explains, how companies can optimally prepare PDF files for variable data printing.

Container ship called 'MS Dietrich'


How Google Trends sees “pdf” in 2022

As of October 28 2022 worldwide searches for “pdf” had peaked in March, 2022. Even as internet searches continue to rise worldwide, “pdf” keeps up.



End of life for Type 1 fonts in authoring applications

Some time ago Adobe announced that it “will disable support for authoring with Type 1 fonts by January 2023”. Dietrich von Seggern from callas software explains what that means from a prepress and PDF point of view.



Bringing PDF forms up-to-date

John Brinkman provides an update on the work of the PDF Association’s Forms TWG and its development of the next generation of PDF forms.

A fillable form


Practical advice on using some of the most used PDF subset standards

Dietrich von Seggern and Akash Choudhary from callas software and David van Driessche from Four Pees are presenting at this year’s PDF Days Europe sharing practical advice on using some of the most used PDF subset standards.

Photo of the Berlin skyline


A new meeting place for developers working with accessibility and PDF

The new PDF/UA Processor LWG’s mission is to establish principles and a framework, and then develop requirements for PDF/UA processors and assistive technology (AT).