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PDF is Publication Type in Thoth.
PDF is human-readable file format developed by Adobe in 1993. It is based on Postscript and encodes the appearance of information on a printed page, as such it contains a complete description of layout and typography. There are multiple PDF extensions, with PDF/A being the preferred format for long-term preservation.
Archiving & preservation concerns: As confirmed with a digital preservation body, a PDF file is not recognised in preservation workflows as a "container" file, and therefore any embedded files (images, videos, etc.) are not updated to the most recent format during active preservation (even if the PDF file itself is updated). This is in contrast to XML, Zip, or BaggIt packages, which are recognised as "containers" and therefore the files within these are actively preserved as files.
ISO 14289-1 is also known as PDF/UA (Portable Document Format, Universal Accessibility), and is aimed at everyone involved in creating PDF. It is based on the PDF standard ISO 32000-1 (also known as Adobe PDF 1.7) and directly references that. It sets minimum requirements that make sure documents are compliant with devices that support people with disabilities. PDF/UA files require the information on their pages to be tagged, and it also allows users to create structure trees out of tags so that assistive programmes know in which order to read information.
The Thoth Wiki has been developed in the context of the COPIM (Community-led Open Publication Infrastructures for Monographs) project. Individual contributions to the wiki have been made by Tim Elfenbein, Joanne Fitzpatrick, Rupert Gatti, Ross Higman, Hannah Hillen, Brendan O'Connell, Tobias Steiner, and Vincent W.J. van Gerven Oei under the general editorship of Van Gerven Oei. All data are available under a CC-BY 4.0 license.