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The PDF Association celebrates its members’ public statements
of support
for ISO-standardized PDF technology.

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Twenty Years of Trust: Celebrating the 20th Anniversary of PDF/A-1

November 2025 by PDF Association staff

This month the PDF industry is celebrating the 20th anniversary of PDF/A-1 (ISO 19005-1:2005), the publication of which revolutionized digital preservation.

Before this standard, archiving suffered from dependency issues. PDF/A-1, based on a constrained subset of PDF 1.4, mandated self-contained, device-independent documents. These rules ensure that a PDF/A document’s appearance can be reliably maintained over centuries, regardless of viewing software.

Rapidly adopted globally, the principles established in PDF/A-1 persist in later standards like PDF/A-4, which is based on PDF 2.0, the latest ISO standard for PDF.

Happy 20th, PDF/A! We (ok, not us personally) fully expect to be celebrating your 200th anniversary in November 2225!

This month the PDF industry is celebrating the 20th anniversary of PDF/A-1 (ISO 19005-1:2005), the publication of which revolutionized digital preservation.

Before this standard, archiving suffered from dependency issues. PDF/A-1, based on a constrained subset of PDF 1.4, mandated self-contained, device-independent documents. These rules ensure that a PDF/A document’s appearance can be reliably maintained over centuries, regardless of viewing software.

Rapidly adopted globally, the principles established in PDF/A-1 persist in later standards like PDF/A-4, which is based on PDF 2.0, the latest ISO standard for PDF.

Happy 20th, PDF/A! We (ok, not us personally) fully expect to be celebrating your 200th anniversary in November 2225!

PDF technical resources for the less technically-minded

July 2021 by PDF Association staff
News


Technical resources on pdfa.org are now more understandable and navigable by less technically experienced readers as well as knowledgeable developers.

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July 2021 by Peter Shikli (Access2online Inc.)
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PDF documents can be as accessible as web pages if presented correctly.

Article

July 2021 by Peter Wyatt
Peter Wyatt
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To assist both academic and industry researchers achieve high-quality and accurate PDF-oriented research outcomes, the PDF Association is now offering … Read more

Article

June 2021 by PDF Association staff
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Check out the agenda for PDF Days Europe 2021, and get your early bird ticket while they last!

PDF Association news

June 2021 by PDF Association staff
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pdfa.org resources now include a new technical index, list of GitHub repos and more.

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June 2021 by Peter Wyatt
Peter Wyatt
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Doing PDF right means being aware of errata for PDF 2.0. With over 65 issues now resolved and approved by … Read more

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June 2021 by PDF Association staff (Adobe)
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The Endowment supplements membership dues to enable the PDF Association to maintain and extend its support for administration of ISO … Read more

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May 2021 by Peter Wyatt
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The PDF Association expands its pdf-issues GitHub repo to cover all ISO standards based on PDF 2.0.

Article

May 2021 by Peter Wyatt
Peter Wyatt
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The LangSec IEEE S&P Workshop this year includes several PDF-related presentations resulting from SafeDocs research including a paper by CTO … Read more

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May 2021 by PDF Association staff
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An overview of industry working-group activities pertaining to tagged PDF.

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April 2021 by PDF Association staff
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Version 1.18 of veraPDF, the industry-supported PDF/A validator, is now available for download, and now includes support for PDF/UA-1 (machine … Read more

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