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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.

PDF Liberation Hackathon — Jan 17-19, 2014

January 2014 by Olaf Drümmer
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The Sunlight Foundation PDF Liberation Hackathon will be held at 6 locations on the Jan 17-19, 2014, weekend. It will focus on applying PDF extraction technologies to real world problems. … Read more

Visit Olaf Drümmer's profile.

March 2012 by Duff Johnson
Duff Johnson
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The December 2011 ANPRM asserts “…it is straightforward to apply the WCAG 2.0 Success Criteria and Conformance Requirements to all … Read more

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