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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.

2022: The last year of paper for records-keeping

October 2017 by PDF Association staff
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NARA (The National Archives and Records Administration) is the final depository for the long-term records generated by all other agencies of the U.S. Federal Government. The agency has a key … Read more

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August 2017 by Duff Johnson
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The Portable Document Format is perhaps the most common example of a de facto standard, so much so that Wikipedia … Read more

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August 2017 by Matt Kuznicki
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The PDF Association is proud to present the first PDF 2.0 example files made available to the public. Created and … Read more

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July 2017 by PDF Association staff
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The Portable Document Format (commonly known as “PDF”) is a file format developed in the early 1990s as a way … Read more

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July 2017 by PDF 2.0 interops help vendors

The PDF 2.0 interop workshops included many vendors with products for creating, editing and processing PDF files. They came together … Read more

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June 2017 by PDF Association staff
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2017 marks a record number of attendees / Experts shared fully-grounded wisdom on PDF standards across the two-day event Berlin. … Read more

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May 2017 by Andrew Bailes-Collins
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by Andrew Bailes-Collins Where do all these different flavors of PDF/X fit, and for anybody wanting to use PDF/X, which … Read more

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May 2017 by Andrew Bailes-Collins
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by Andrew Bailes-Collins PDF/X Tools The good news for anybody wishing to start working with PDF/X standards, is that there … Read more

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May 2017 by Stephan Jaeggi
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by Stephan Jaeggi PDF/X only defines the general requirements for a reliable exchange of prepress data; the ISO standard itself … Read more

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May 2017 by Dietrich von Seggern
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by Dietrich von Seggern Specialized ISO standards based on the Portable Document Format are available for a wide range of … Read more

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May 2017 by Dietrich von Seggern
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by Dietrich von Seggern PDF/X was the first ISO standard based on PDF technology. A subset of the PDF specification, … Read more

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