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Figurative representation of the future PDF specification.
SafeDocs Phase 3: Revolutionizing file format specifications, beginning with PDF

DARPA will provide seed funding of $1.3M for research and prototyping centered on reinventing the PDF specification and delivering on the benefits of defining file …

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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).



MACs vs. signatures in PDF

Matthias Valvekens explains the difference and respective value of digital signatures vs. MAC-based technology for authenticating PDF files.

A signed document delivered via computer.


ISO 32004: an overview

Matthias Valvekens, the ISO project leader who led development of ISO 32004, has written a pair of blog posts to explain what ISO 32004 does and does not achieve in leveraging MAC technology for securing encrypted PDF files against tampering.

Schematic of an ISO/DTS 32004 MAC in context.


PDF on GAAD: because it’s the content you keep

Tagged PDF is becoming increasingly common. On #GAAD 2022, PDF/UA’s ISO Project Leader takes stock of the progress and highlights what remains.

GAAD logo


Updating PDF-related MIME types

The PDF Association has updated IANA’s MIME media types registry for FDF, XFDF, PRC and U3D.

application/fdf, application/xfdf, application/pdf, model/prc, model/u3d, model/step


The route to PDF/X and where we are now: a personal history

Martin Bailey reflects on the history of PDF/X and its impact on production printing and the exchange of documents in PDF workflows.

Typefaces in CMYK colors.