This session will present a summary of the progress of the forms technical working group. PDF forms require updates in several areas: Better accessibility Support for reflow Reduced reliance on JavaScript Modernization of the technology stack The presentation will elaborate … Read more

PDFs have been around for nearly 30 years now and the very ability to ensure perfect representation of graphic content has led the PDF format to become a very powerful ISO standard.  The comprehensive specification of fonts, device-independent colorspaces, transparency, … Read more

In the concept of omni channel marketing, print is one channel amongst others in customer communication. Individualized print requires not only high speed printing machines – it also means that PDFs have to be processed (ripped) as quickly as these … Read more

In Summer 2020 the LaTeX Project Team announced the start of a multi-year project [1, 2] to produce tagged and accessible PDF from existing  LaTeX sources with no or only minimal configuration adjustments. In this talk we describe the current … Read more

We all know PDF from daily life. If you were to ask a room full of people whether they’ve come into contact with a PDF document, all would raise their hand. From invoices, receipts, to lab-results (keeping it current for … Read more

HexaPDF (https://hexapdf.gettalong.org) is a PDF library written in Ruby. It aims to provide the full spectrum of PDF functionality with the exception of rendering. This presentation focuses on how HexaPDF implements the PDF specification and how Ruby is actually quite … Read more

One criticism that is commonly levelled at PDF is that when looking at a PDF document, the user generally has no easy way of knowing whether the document they’re looking at is current or not. While this isn’t an issue … Read more

There are many ways and tools to make a PDF. However, sometimes the resulting document may take up significantly more disk space than you would expect based on its content. It therefore makes sense to try to reduce the size … Read more

PDF is one of the most used document formats in the world! This is a fact we should all be proud of. But the downside of this is that PDF files in all their glory and elegance can also be … Read more

A staple in the toolbox of the Software Engineer is a solid test suite. Unit tests, Integration tests, and System tests are just a selection out of the vocabulary used on a daily basis. As PDF developers we also have … Read more

As one of the most common data-representation formats, the table has taken a significant place in documents because of its capability of representing the wealth of information. However, in reality, a vast of tables are published in an uneditable format … Read more

The specifications of the Ghent Workgroup – built on top of the ISO PDF/X standards – are followed across the world and are built into a lot of major graphics arts applications. The Ghent Workgroup last released a major specification … Read more

Assumed to be secure for 15 years, our talk reveals what could go wrong while a PDF document is being verified. We elaborated novel attacks leading to critical vulnerabilities in all PDF viewers, most notably in Adobe, Foxit, and LibreOffice. … Read more

This presentation is primarily aimed at developers who are designing and implementing digital document workflows requiring trusted signature models. Electronic signatures are an essential part of digital transformation, and many vendors offer e-sign features. Vendor-specific implementations don’t usually allow interoperability, … Read more

Digital signatures have been an integral part of the PDF specification since version PDF 1.3. No other document format has such a deep integration of signatures. Well over 90 percent of all signed documents are PDF. This presentation shows the … Read more

Join CEO Duff Johnson and CTO Peter Wyatt as they discuss current and future PDF Association initiatives. Intended primarily for members, this session is also open to non-members.

PDFs in the wild offer a bewildering amount of variation in syntax, features and structure.  For those building parsers or evaluating parsers, it is critical to have a broad coverage corpus available to assess and discover distributions of issues “in … Read more

Was hat sich seit den letzten PDF Days beim PDF-Export mit Bordmitteln von Microsoft Office oder LibreOffice getan? Die Erstellung von vollständig barrierefreien PDF-Dokumente nach PDF/UA-Standard ist nach wie vor nicht möglich und erfordert eine Nachbereitung. Aber von Jahr zu … Read more

We will examine how specific problems are handled in these (not so) similar processes. Sometimes PDF/A validation can be more complex than PDF/A conversion, and in other cases, is it the other way around. What makes a document difficult to … Read more

At the moment WCAG validation is a legal requirement, while PDF/UA is not (unfortunately). In this talk we make an attempt to perform a gap analysis between these standards, taking PDF/UA-1 and Matterhorn 1.1 protocol as a basis and analyzing the … Read more