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PDF/UA Processor LWG

Improving accessibility support for PDF documents means improving the way PDF viewers, other PDF processors and assistive technology (AT) handle tagged PDF.

To support this objective the PDF/UA Processor LWG was created at the request of ISO TC 171 SC 2 WG 9, the ISO working group responsible for development of PDF/UA.

This Liaison Working Group is a meeting-place for the PDF and assistive technology industries to help drive the formalization of common understandings on processing PDF files that conform to ISO 14289 (PDF/UA), the standard for accessible PDF documents.

Although the current edition of ISO 14289, PDF/UA-1, includes some basic requirements for processors, these have not seen the same degree of marketplace uptake as PDF/UA’s file format requirements. Accordingly, PDF/UA-2, anticipated to be published in 2023, differs from PDF/UA-1 in that it will focus exclusively on file format requirements. Processor requirements will be developed in a separate dedicated specification, the work of this LWG.

Critical to this work is the involvement of developers who focus on assistive technology, including accessibility APIs. For this reason the Board of Directors has decided to make it possible for non-members with tangential interest in PDF technology to participate in the committee’s online discussions, meetings and development of the draft specification.

Join us! PDF Association members can simply join this community via the Member Area on pdfa.org. We strive to accommodate users with disabilities in all our communications, meetings and processes. Non-members wishing to participate at no cost should contact info@pdfa.org to request access.

NOTE: Those who participate in this LWG without PDF Association membership or Invited Expert status do not have access to PDF Association members-only resources, including the PDF/UA TWG, or to draft ISO documents.


Want to find out what we’ve been up to and where we are headed, since this article was written?  Learn more in this article under “Our approach thus far,” “An example of the work,” and “Next steps”.


Paul Rayius

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