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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.

Announcing the Email Archiving with PDF Liaison Working Group

November 2021 by PDF Association staff
Article


Almost every email client can save email messages as PDF files, but none do so in a manner that retains email structures or metadata proving message authenticity. The EA-PDF specification … Read more

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November 2021 by Peter Wyatt
Peter Wyatt
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This freely-available PDF file includes 8 test cases that only render correctly if the abbreviated key name is used. If … Read more

Article

October 2021 by Duff Johnson
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The CEO of the PDF Association reflects on the steady expansion of the organization’s mission and the future.

PDF Association news

October 2021 by Peter Wyatt
Peter Wyatt
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PDF issues has been redesigned based on industry feedback: all resolved errata are now published via https://pdf-issues.pdfa.org.

Article

October 2021 by Dietrich von Seggern (callas software GmbH)
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Dietrich von Seggern from callas software explains why companies should not leave the generation of PDF/A to their staff, but … Read more

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October 2021 by Peter Wyatt
Peter Wyatt
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On World Standards Day 2021 the PDF Association celebrates PDF’s connection to the UN’s Sustainable Development Goals (SDGs).

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October 2021 by Peter Wyatt
Peter Wyatt
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As a consumer of standards, have you ever stopped and critically reviewed what a standard essentially is and how it … Read more

Article

October 2021 by Dietrich von Seggern (callas software GmbH)
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callas software’s Dietrich von Seggern describes what “owned by ISO” really means, and why that matters, in celebration of World … Read more

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September 2021 by PDF Association staff
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For developers and heavy users of PDF technology the Technical Days and Solution Days sessions that make up PDF Days … Read more

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September 2021 by Peter Wyatt
Peter Wyatt
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This article describes how PDF Association communities work, and how members can establish common understandings, participate on the development of … Read more

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September 2021 by PDF Association staff
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We have enhanced the PDF Association’s Feature Support pages to be driven by members’ product and services showcase listings on … Read more

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