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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.

Brotli compression coming to PDF

March 2025 by Robin Watts (Artifex Software Inc)
Article


Brotli compression is coming soon to PDF 2.0, enabling smaller file sizes. Sample PDF files are available to kickstart development!

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March 2025 by PDF Association staff
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When will AI understand document semantics? | Will LLM-based OCR live up to the challenge? | Indicating whether the publisher … Read more

PDF in the Wild

March 2025 by Erin Dempsey (TWAIN Working Group)
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This article explores how ISVs can use PDF/R to improve imaging application software’s efficiency, reduce development complexity, and enhance customer … Read more

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March 2025 by PDF Association staff
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The PDF Association will host a trio of PDF technology events in Berlin from September 11-19. Save the date… and … Read more

PDF Association news

February 2025 by PDF Association staff
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The new TWG will explore topics such as verifiable credentials, digital signatures, modern cryptography and content provenance frameworks in alignment … Read more

PDF Association news

February 2025 by PDF Association staff
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These free XMP Extension Schema templates support PDF documents that conform to multiple subset standards, including PDF/A, PDF/X, PDF/VT, and … Read more

PDF Association news

February 2025 by Peter Wyatt
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Google’s Jpegli promises smaller JPEG images (and so, smaller PDF files) with no change to reader software! Check it out … Read more

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February 2025 by PDF Association
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PDF Week Boston 2025 is the first of two members-only events in 2025 focused on PDF technology specifications and standards … Read more

PDF Association news

February 2025 by PDF Association staff
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PDF bookmarks from Google Chrome? | What does “PDF” mean to you? | Two reasons why everyone needs PDF | … Read more

PDF in the Wild

February 2025 by PDF Association staff
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Organizations worldwide rely on email at almost every level of daily operations, but lack options for effectively preserving and accessing … Read more

PDF Association news

January 2025 by PDF Association staff
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Adobe, a Partner member of the PDF Association, has renewed its Standards Support Endowment for 2025, marking the 7th year … Read more

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