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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.

Hotel Recommendations and Sightseeing Tips for PDF Days Europe 2018 in Berlin

February 2018 by PDF Association staff
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The No. 1 PDF event – the PDF Days Europe 2018 in Berlin? Great! Here are some hotel recommendations and sightseeing tips near the event location (SI Hotel).

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February 2018 by PDF Association staff
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Richard Cohn, Principal Scientist at Adobe, one of the two co-authors of the original PDF specification in the era of … Read more

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February 2018 by Duff Johnson
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Introduction PDF technology profiles can be leveraged to provide trusted, predictable containers for record types that often present workflow and … Read more

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February 2018 by PDF Association staff
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Over 260 attendees from 40+ federal and state agencies The latest PDF Day event was held on January 29th at … Read more

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January 2018 by PDF Association staff
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The PDF Association returns to Washington DC next Monday, January 29, 2018 for PDF Day DC, a single day packed … Read more

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December 2017 by Duff Johnson
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PDF files deliver a complete package of information that defines a document; everything that’s needed to represent the text, graphics … Read more

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December 2017 by PDF Association staff
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Earlier in 2017 both the US Library of Congress and NARA joined the PDF Association as Liaison members, an option available to non-profit … Read more

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December 2017 by Duff Johnson
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What is a “document”? A document is a record of some (typically written) content – a publication, a contract, a … Read more

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December 2017 by Hans Bärfuss
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SD Times, a leading periodical targeting systems and application developers, has featured PDF in its December 2017 publication. The journalists … Read more

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November 2017 by PDF Association staff
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PDF 1.7, the final Adobe edition of the PDF specification, was published in 2006, and converted to an ISO standard … Read more

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November 2017 by PDF Association staff
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The latest release of veraPDF, the industry-supported, open source PDF/A validator, is now available for download. Version 1.10 is the … Read more

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