PDF Association logo

Discover pdfa.org

Key resources

Get involved

How do you find the right PDF technology vendor?
Use the Solution Agent to ask the entire PDF communuity!
The PDF Association celebrates its members’ public statements
of support
for ISO-standardized PDF technology.

Member Area

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.

Interop workshops: building a test matrix

March 2017 by PDF Association staff
Article


How will the PDF 2.0 interop workshops work? This article explains the process of building the test-matrix to establish possibilities for pair-wise testing.

PDF Association logo
Visit PDF Association staff's profile.

March 2017 by PDF Association staff
PDF Association logo
Visit PDF Association staff‘s profile.

With over 35 informative sessions across a wide range of topics spanning the future of PDF technology, this year’s PDF … Read more

Article

February 2017 by Duff Johnson
Duff Johnson
Visit Duff Johnson‘s profile.

As we reported yesterday, those in the crypto world are well-aware that Google and others have proven that SHA-1, the … Read more

Article

February 2017 by PDF Association staff
PDF Association logo
Visit PDF Association staff‘s profile.

It is now proven that the contents of a PDF hashed with SHA-1 can be changed without invalidating the signature, … Read more

News

February 2017 by PDF Association staff
PDF Association logo
Visit PDF Association staff‘s profile.

With over 35 informative sessions across a wide range of topics, including next-generation PDF, this year’s PDF Days event is … Read more

PDF Association news

February 2017 by PDF Association staff
PDF Association logo
Visit PDF Association staff‘s profile.

On Wednesday, May 17, 2017, directly following PDF Days Europe, the PDF Days Post-Conference offers a variety of various workshops … Read more

PDF Association news

February 2017 by Duff Johnson
Duff Johnson
Visit Duff Johnson‘s profile.

The veraPDF consortium has completed PREFORMA’s prototyping phase, and has been awarded the contract for the final six month testing … Read more

News

February 2017 by PDF Association staff
PDF Association logo
Visit PDF Association staff‘s profile.

With over 35 informative sessions across a wide range of topics, including the next-generation PDF project, this year’s PDF Days … Read more

PDF Association news

February 2017 by PDF 2.0 interop events: risk management and efficiency

Some customers will decide to make the jump to PDF 2.0. Others will be blissfully unaware that it’s heading toward … Read more

Article

February 2017 by Duff Johnson
Duff Johnson
Visit Duff Johnson‘s profile.

The first post-Adobe ISO standard for PDF technology creates new opportunities for developers of electronic document software. Berlin, February 2, … Read more

News

January 2017 by Duff Johnson
Duff Johnson
Visit Duff Johnson‘s profile.

The US Access Board has issued new rules updating its “Section 508” accessibility requirements. PDF/UA-1 support is required for PDF … Read more

News

Member News

WordPress Cookie Notice by Real Cookie Banner