Climbing the Matterhorn Protocol

The PDF Association‘s PDF/UA Competence Center, now known as the PDF/UA Technical Working Group recently published Climbing the Matterhorn: An introduction to the definitive algorithm for PDF/UA conformance

“This article is directed primarily at implementers, quality assurance (QA) and technical product managers interested in supporting accessibility in PDF. It describes the purpose and function of the Matterhorn Protocol, and explains how developers may use this document to address PDF/UA conformance in a systematic and reliable manner.”

The PDF/UA Competence Center focuses on developing a specification for accessible PDF, in particular ensuring conforming PDF files are accessible and usable to all, including those who use assistive technology.