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

New Application Note Illuminates PDF’s Flexible Options for Custom Metadata

October 2025 by PDF Association staff

The PDF Association has released a new Application Note titled “Including Custom Metadata Structures in PDF.”

This document addresses the need for organizations to use custom metadata beyond standard XMP schemas in their PDF workflows. It provides guidance on designing custom metadata schemas, embedding them interoperably, best practices for versioning and extensibility, and strategies for exposing metadata to applications and tools.

The document’s objective is to enhance interoperability and efficiency by allowing custom metadata to travel seamlessly within PDF documents, eliminating the need for separate “sidecar files.”

The Note is now available on the PDF Association website.

The PDF Association has released a new Application Note titled “Including Custom Metadata Structures in PDF.”

This document addresses the need for organizations to use custom metadata beyond standard XMP schemas in their PDF workflows. It provides guidance on designing custom metadata schemas, embedding them interoperably, best practices for versioning and extensibility, and strategies for exposing metadata to applications and tools.

The document’s objective is to enhance interoperability and efficiency by allowing custom metadata to travel seamlessly within PDF documents, eliminating the need for separate “sidecar files.”

The Note is now available on the PDF Association website.

PDF 2.0 adds glTF model support

April 2024 by PDF Association staff
PDF Association news


A new ISO extension to PDF 2.0 adds PDF support for the Khronos Group’s glTF 3D format.

PDF Association logo
Visit PDF Association staff's profile.

April 2024 by Peter Wyatt
Peter Wyatt
Visit Peter Wyatt‘s profile.

All ISO publications are written according to a set of rules known as the ISO Directives. In this article, the … Read more

Article

April 2024 by axes4 GmbH
axes4 Logo horizontal
Visit axes4 GmbH‘s profile.

Accessibility is vital for ensuring that everyone, regardless of their abilities, can fully participate in society. This article delves into … Read more

Article

March 2024 by PDF Association staff
PDF Association logo
Visit PDF Association staff‘s profile.

Authoritative answers to common questions about Tagged PDF, WTPDF and PDF/UA.

PDF Association news

March 2024 by Peter Wyatt
Peter Wyatt
Visit Peter Wyatt‘s profile.

How meaningful is PDF’s version number? SafeDocs’ research reveals that 20% of extant files contain features that exceed the stated … Read more

Article

March 2024 by Peter Wyatt
Peter Wyatt
Visit Peter Wyatt‘s profile.

Peter Wyatt shares his custom metadata panels – very useful for discovering ISO standards and PDF Declarations metadata! (until vendors … Read more

Article

March 2024 by PDF Association staff
PDF Association logo
Visit PDF Association staff‘s profile.

Based on WTPDF, ISO 14289-2 serves to assure institutions that the PDF Association’s requirements for creating and validating accessible PDF … Read more

PDF Association news

March 2024 by PDF Association staff
PDF Association logo
Visit PDF Association staff‘s profile.

Join pdfa.org for exclusive member benefits tailored to PDF development. Our Member Benefit Manager, Melina, engages in insightful discussions with … Read more

PDF Association news

March 2024 by PDF Association staff
PDF Association logo
Visit PDF Association staff‘s profile.

The latest veraPDF release candidate adds PDF/UA-2 support. LibreOffice creates PDF/A and PDF/UA together. A “white paper” gets PDF wrong, … Read more

PDF in the Wild

March 2024 by PDF Association staff
PDF Association logo
Visit PDF Association staff‘s profile.

The PDF Association has established a new Liaison Working Group (LWG) to serve as a place for forensics experts and … Read more

PDF Association news

February 2024 by PDF Association staff
PDF Association logo
Visit PDF Association staff‘s profile.

Well-Tagged PDF (WTPDF), a common specification for both reuse and accessibility, is a massive leap forward for PDF technology.

PDF Association news

Member News

WordPress Cookie Notice by Real Cookie Banner