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Announcing the first PDF Week, May 2-5 2023

A new type of PDF Association event, PDF Week is the ideal way to get to know the experts developing and advancing PDF technology.

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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.


How to convince your boss to let you attend PDF Days

5 reasons your boss should want you to attend PDF Days Europe 2022 in September!

Working together at PDF Days Europe 2022


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.


Introducing non-rectangular links to PDF

Non-rectangular links are coming to PDF 2.0! This article offers some background to link technology in PDF and discusses the forthcoming Extension to PDF 2.0.

Screen-shot of long Table of Contents entries line wrapping with Link annotation QuadPoints boundaries highlighted.


PDF 2.0 adds STEP 3D model support

With the publication of ISO/TS 24064 PDF 2.0 now supports three 3D formats: U3D, PRC and STEP.

Engineering drawing and finished piece.