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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.

OctoberPDFest ONLINE – Registration is Open!

August 2020 by PDF Association staff
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This free educational webinar series celebrates PDF technology capabilities and solutions. OctoberPDFest highlights the latest developments, visions of the future and many other subjects. Check out the agenda to learn … Read more

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August 2020 by Dietrich von Seggern (callas software GmbH)
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Ensuring maximum success in RPA processes requires uniformity (standardization) in inputs. That’s where PDF can help.

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July 2020 by PDF Association staff
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The PDF Association is assembling dozens of the world’s leading experts on PDF technology for a free educational webinar series … Read more

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July 2020 by Ferass Elrayes
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Google’s Chrome browser now creates tagged PDF files when the “Save as PDF” option is selected (Control / Command-P).

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July 2020 by PDF Association staff
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This WG identifies and addresses the interests of service bureau operators working on PDF accessibility, providing a vendor-neutral place to … Read more

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July 2020 by Dietrich von Seggern
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This article provides information about virtual ISO meetings during which PDF proper, PDF/A, PDF/X and PDF/VT were discussed. ISO committees … Read more

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June 2020 by PDF Association staff
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Members should review this post carefully, as these changes affect your current access to PDF Association features including working group … Read more

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June 2020 by PDF Association staff
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The PDF Association is deepening its commitment to ISO standards development while driving research into enhancing the format and its … Read more

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May 2020 by PDF Association staff
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This October 2020 free webinar series celebrates the diversity of PDF technology capabilities and solutions. If you work with PDF … Read more

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May 2020 by PDF Association staff
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The latest release of the industry-supported PDF/A validator has been released. An open source project developed by the Open Preservation … Read more

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May 2020 by PDF Association staff
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The PDF Association and the 3D PDF Consortium have partnered to develop a high-level introduction to the role and capabilities … Read more

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