ISO 19005-4:2020

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ISO 19005-4:2020, also known as PDF/A-4, specifies a particular use of the Portable Document Format (PDF) 2.0 for long-term preservation of electronic documents. It focuses on ensuring that the static visual representation of page-based electronic documents is preserved over time, allowing for the inclusion of other content as attachments. This standard is part of a broader family of standards (ISO 19005) aimed at defining file formats for long-term preservation, specifically using PDF/A.