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https://pdfa.org/resource/technical-note-tn-0009-xmp-extension-schemas-in-pdfa-1/

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PDF/VT TWG – PDF Association

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The Matterhorn Protocol 1.1 – PDF Association

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https://pdfa.org/resource/pdf-2-0-application-note-001-black-point-compensation/

PDF 2.0 Application Note 001: Black Point Compensation – PDF Association

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https://pdfa.org/resource/cal-poly-pdfvt-test-suite/

Cal Poly Graphic Communications PDF/VT Test File Suite 1.0.2 – PDF Association

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https://pdfa.org/resource/pdf-2-0-application-note-002-associated-files/

PDF 2.0 Application Note 002: Associated Files – PDF Association

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https://pdfa.org/resource/technote-0010-clarifications-of-iso-19005-parts-1-3-for-developers-of-pdfa-creators-and-validators/

Technical Note 0010 – PDF Association

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https://pdfa.org/brotli-compression-coming-to-pdf/

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https://pdfa.org/resource/tagged-pdf-best-practice-guide-syntax/

Tagged PDF Best Practice Guide: Syntax – PDF Association

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https://pdfa.org/resource/technical-note-tn0008-predefined-xmp-properties-in-pdfa-1/

Technical Note 0008 – Predefined XMP Properties in PDF/A-1 – PDF Association

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