To promote adoption of PDF/UA by software developers and document testers alike, the PDF Association’s PDF/UA Competence Center developed the Matterhorn Protocol, a list of all the possible ways to fail PDF/UA.
Following the requirements of PDF/UA, the document consists of 31 Checkpoints comprised of 136 Failure Conditions.
The 1.02 release of the Matterhorn Protocol, dated April 30, 2014, provides minor editorial corrections. One checkpoint – 08-003 – has been moved and is now designated 01-007. The Matterhorn Protocol PDF is a reference-quality PDF/UA conforming file.
Published in 2012, PDF/UA is the ISO Standard for accessible PDF files and consuming software. It sets precise technical standards for accessible PDF files and establishes a high bar for tagging quality.
Download the Matterhorn Protocol using the link below.
Note: The download is a PDF file conforming to PDF/UA-1 (ISO 14289-1) and to PDF/A-2a (ISO 19005-2).