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ISO standards, test suites, best-practice guides…

The PDF Association publishes a variety of documents and other resources for those interested in leveraging PDF technology, and as of Q4 2021, also sells the ISO standards relating to PDF technology as developed by ISO TC 171 SC 2.

In addition to formal ISO standards many PDF Association publications developed through our publications process are freely available.

PDF Association members may access process documents and drafts of upcoming ISO standards via the Member Area.

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ISO 32000 (PDF)

PDF 2.0

ISO 32000 is the family of ISO standards that defines the core PDF specification for both PDF 1.7 and PDF 2.0.

ISO 32000-2 Document management Portable Document Format Part 1 PDF 2.0 cover with PDF Association logo


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Technical Note 0003 – Metadata in PDF/A-1

PDF/A-1 imposes certain requirements and restrictions on document metadata in a compliant PDF/A-1 file where certain information is required to be encoded as XMP metadata, while corresponding entries in the document information dictionary for a document may be present but …

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Technical Note 0001 – PDF/A-1 and Namespaces

A PDF/A-1 file must be identified as such by the presence of a certain entry in its XMP document metadata. In order to be able to retrieve this entry reliably, it is essential that all syntactical requirements for storing metadata …

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Technical Note 0006 – Digital Signatures in PDF/A-1

Digital signatures are primarily used to check the integrity of the signed part of the document. They also can be used to authenticate the signer¬ís identity and determine the time of signing. The concept of digital signatures was introduced in …

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Technical Note 0002 – Color in PDF/A-1

The PDF/A-1 requirements related to color handling may be confusing to users and developers who are not familiar with color management concepts and ICC profiles. This TechNote describes the affected objects in PDF, details the requirements of PDF/A-1 with respect …

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ISO 19005 (PDF/A)

ISO 19005 is a series of standards known as PDF/A which defines a subset of PDF for representing electronic documents in a manner that preserves their static visual appearance over time, independent of the tools and systems used for creating, …

ISO 19005-4 Document management Electronic document file format for long-term preservation Part 4 Use of ISO 32000-2 PDF/A-4 cover with PDF Association logo


The Camelot Project

Written by Adobe Systems co-founder Dr. John Warnock in 1990, the Camelot Project describes the vision that became PDF. Dr. Warnock created this PDF in 1995. It conforms with PDF 1.2, which explains the lack of accessibility features (introduced with …

The Camelot Project