About the contributor
Duff Johnson

A veteran of the electronic document space, Duff Johnson is an independent consultant, Executive Director of the PDF Association and ISO Project co-Leader (and US TAG chair) for ISO 32000 and ISO 14289.
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Five reasons developers should participate in PDF Days Europe

PDF Days Europe, the annual PDF technology education event, will take place from 14 to 16 May 2018 in Berlin at the Hotel Steglitz International. Of the many good reasons for developers to participate, here are five of the best.

5 reasons why those implementing electronic document technologies should attend PDF Days Europe

PDF Days Europe, the annual PDF technology education event, will take place from 14 to 16 May 2018 in Berlin at the Hotel Steglitz International. Of the many good reasons for users to participate, here are five of the best.

2018 PDF 2.0 Interop Workshop

Following the success of our previous interop workshops in Cambridge, England and Boston, Massachusetts, the 3rd PDF 2.0 Interop Workshop takes place on May 16, 2018 as part of the post-conference program immediately following this year’s PDF Days Euro …

Post-Conference of PDF Days Europe 2018 in Berlin

On Wednesday, May 16, 2018, directly following PDF Days Europe, the PDF Days Post-Conference offers a variety of workshops on PDF 2.0 Interop or PDF/UA.

PDF Days Europe 2018 – schedule of sessions

Fittingly for the tenth anniversary of PDF’ becoming an ISO standard, standardization will play a significant role this year. The focus will be on recent developments, with an eye on the future. The agenda also includes PDF market analyses, next-generation PDF for mobile devices, universally accessible PDF files and the industry-supported veraPDF validator initiative.

The Value of Tagged PDF

PDF was originally intended to serve as electronic paper; a properly rendered page irrespective of software or operating system.  Pages, however, aren’t just for reading. Since people like to add notes, draw lines and fill forms, Adobe Systems, the inventors of PDF, decided to cater to these uses as well. PDF rapidly accumulated new features beyond faithfulness to the rendered page – it began to mirror the interactive capabilities of real paper.

The first generation of interactive PDF features consisted of annotations of various types. Some allowed users to add text, others allowed users to draw lines and boxes onto the page. Still others go beyond the paradigm of the page, making it possible to add hyperlinks,  audio and movies to PDF.

The second generation of interactive PDF brought the ability to deploy a PDF’s content outside the page-based world.

Tagged PDF provides the means to effectively deploy a final-form document to a mobile device. It’s the same means by which PDF files may be made accessible to users who requires Assistive Technology (AT) to read.

One of the primary motivations for tagged PDF was to achieve compliance with regulations that require electronic documents to be accessible to users with disabilities, but implementers can leverage tagged PDF to accomplish or enhance a wide range of end user activities.

The following table indicates the utlity of untagged vs. tagged PDF content.

Untagged Content Tagged Content
No semantic types or ordering; content is ordered solely for rendering purposes Semantic type and order is determined, content may be reused accordingly
Search engines cannot reliably access words and phrases Search engines get reliable access to content.
No reliable means of reflowing page content onto smaller devices Includes information necessary for reflow
“Real” content and “artifacts” aren’t distinguished Consuming software can choose to utilize or ignore artifacts
Content copying and extraction is unreliable Content may be extracted with confidence
Not eligible for PDF/A conformance level A May conform with PDF/A conformance level A
Cannot comply with WCAG 2.0 or Section 508 May comply with WCAG 2.0, Section 508 and other accessibility regulations
Inaccessible to disabled users Accessible to those with PDF-aware Assistive Technology

Tags: Section 508, WCAG 2.0, assistive technology, mobile, tags
Categories: PDF, PDF/UA