The PDF Techniques Accessibility Summit’s objective is to establish a broad-based understanding of how PDF files should be tagged for accessibilty. It’s an opportunity to focus on establishing a common set of examples of accessible PDF content, and identify best-practice when tagging difficult cases.Modernizing PDF Techniques for Accessibility
The PDF Techniques Accessibility Summit will identify best-practices in tagging various cases in PDF documents. Questions to be addressed will likely include: the legal ways to tag a nested list, the correct way to caption multiple images, the appropriate way to organize content within headings.Refried PDF
My hospital emailed me a medical records release form as a PDF. They told me to print it, fill it, sign it, scan it and return it to the medical records department, in that order. In 2018? To get the form via email (i.e., electronically), yet be asked to print it? Did the last 20 years just… not mean anything! So I thought I’d be clever. I’d fill it first, THEN print it. Or better yet, never print it, but sign it anyhow, and return it along with a note making the case for improving their workflow. The story continues…Slides and video recordings of PDF Days Europe 2018
You missed the PDF Days Europe 2018? Never mind! Here you can find the slides and video recordings of all 32 stunning sessions!Using PDF/UA in accessibility checklists
PDF/UA, like PDF itself, is internally complex, but used correctly, actually makes things easier.
by Peter De Bruyne
Even as the first part of PDF/X was published as ISO 15930-1 in 2001, others were already in development. PDF/X rapidly expanded into a fami.ly of standards supporting a wide variety of print production workflows. Each part of PDF/X builds on a previous part, providing flexibility while ensuring reliable exchange, the core rationale for PDF/X.
PDF/X-1a was the first and most restrictive member of the PDF/X family. PDF/X-1a aims for “complete exchange”; a single file must contain all information needed for printing the document as intended by the sender.
Additionally, printing a PDF/X-1a file must be possible without requiring prior color correction. Therefore, print elements can only use CMYK, greyscale or spot colors; no RGB or device-independent color spaces are permitted.
This implies that CMYK or greyscale elements must have been prepared for the intended output process as specified in an Output Intent, which consists largely of an ICC profile characterizing the intended print process. The use of standard Output Intents facilitates the standardized data exchange that is the objective of PDF/X.
PDF/X-3, originally published in 2002, shares most of its requirements with PDF/X-1a, but it lifts the restriction to CMYK and spot colors. In PDF/X-3, graphics can use CMYK, greyscale, RGB, Lab and ICC based color spaces. It requires, however, that device color spaces may be used only if the same color space is used for the ICC profile in the Output Intent, so DeviceRGB requires the Output Intent to use an RGB ICC profile. Since this is usually not the case, as a practical matter, only ICC based RGB or CalRGB are permitted. Accordingly, the faithful reproduction of PDF/X-3 documents requires a color managed workflow.
The strict requirement of including all resources inside a single file is not appropriate for every workflow. PDF/X-2 addresses this need; it allows the use of proxy elements referencing external graphics. Otherwise, PDF/X-2 is the same as PDF/X-3, so it allows color managed elements next to spot colors and device colors prepared for the specified output intent.
The previous PDF/X variants do not support the features of more modern (beyond PDF 1.4) versions of PDF. By 2008, it was time to bring PDF/X up to date with current PDF specifications.
PDF/X-4 is based on PDF 1.6, published in 2004. This specification added support for new features, including layers, JPEG2000, OpenType fonts, and 16-bit images. In addition, PDF/X-4 allows the use of transparency, a PDF 1.4 feature forbidden in PDF/X until PDF/X-4.
PDF/X-4 includes two variations known as “conformance levels”: PDF/X-4 and PDF/X-4p.
PDF/X-5 is a set of three conformance levels, all geared towards different workflows. Each conformance level expands on PDF/X-4 or PDF/X-4p.
PDF/X-6 is currently under development within the ISO committee that manages the PDF/X specification. PDF/X-6 will relax some requirements, but the main difference as compared to previous PDF/X standards is that it will be based on ISO 32000-2, better known as PDF 2.0.
New to PDF 2.0 are page level Output Intents and better support for multichannel print color spaces (more channels than just CMYK) as is increasingly used in packaging or on digital printing devices. Annotations may be used within the print area if they have a printable appearance that complies with the same requirements as any other page content.