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PDF/A and external references

November 2025 by Peter Wyatt

PDF/A ensures reliable long-term rendering by embedding fonts, images, and color profiles, but URLs can still appear in text, hyperlinks, bookmarks, annotations, metadata, and embedded files.

Link annotations and URI Actions define clickable destinations, but PDF/A restricts certain action types to prevent external dependencies.

Guided by clear policies, comprehensive audits of both visible and hidden references help maintain authenticity, accessibility, and long-term integrity of PDF/A documents and digital collections.

PDF/A ensures reliable long-term rendering by embedding fonts, images, and color profiles, but URLs can still appear in text, hyperlinks, bookmarks, annotations, metadata, and embedded files.

Link annotations and URI Actions define clickable destinations, but PDF/A restricts certain action types to prevent external dependencies.

Guided by clear policies, comprehensive audits of both visible and hidden references help maintain authenticity, accessibility, and long-term integrity of PDF/A documents and digital collections.

Slide decks and video recordings of the PDF Days Europe 2016

August 2016 by PDF Association staff
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You missed the PDF Days Europe 2016? Never mind!

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August 2016 by PDF Association staff
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My interview with Nikos Andronikos, who chairs the W3C’s SVG Working Group (WG), about SVG and PDF.

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August 2016 by Duff Johnson
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version 0.20 is a minor update to the software. In addition, 34 files have been aded to the test corpus … Read more

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July 2016 by Duff Johnson
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veraPDF ships a new interim release.

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July 2016 by PDF Association staff
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Governments have a special interest in PDF. The PDF Association helps them understand and address PDF technology in policies and … Read more

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June 2016 by PDF Association staff
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This year, PDF Days Europe is well-established as the world’s top PDF event. Over 150 attendees came to Berlin for … Read more

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June 2016 by PDF Association staff
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I’m honored to have been elected as chairman of the PDF Association’s board of directors in June 2016. Here, I’d … Read more

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June 2016 by Duff Johnson
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The composition of the Board now includes six from Europe and four from North America, including Adlib Software, Adobe Systems, … Read more

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June 2016 by PDF Association staff
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About 150 attendees from all over the world visited the PDF Days Europe 2016 in Berlin.

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June 2016 by PDF Association staff
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Browsers are taking over document viewing. Even so, minimum support for PDF viewing should mean full support for PDF rendering

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June 2016 by PDF Association staff
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For those unable to come to Berlin to attend the «PDF Days Europe 2016», several sessions of the event will … Read more

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