Matterhorn Protocol (V 1.1)
The Matterhorn Protocol 1.1 is a list of concrete tests that, if passed, ensure that a PDF conforms to ISO 14289-1 (PDF/UA-1). This means that when checking a PDF, you don't have to work through the entire ISO standard, but can simply check according to the Matterhorn Protocol instead.
Note: This document was published by the PDF Association and is subject to Creative Commons Attribution 4.0 International LicenseVersion 1.1 of the protocol can be downloaded in English below.
Tagged PDF Best Practice Guide (V 1.0.1)
The Tagged PDF Best Practice Guide is a guide for the correct syntactical tagging structure of an accessible PDF. This guide is relatively technical and therefore not necessarily suitable for the average user. However, it can be very helpful for accessibility specialists to take a closer look at the structure of an accessible PDF (e.g. if you are unsure whether a software has correctly exported a PDF in an accessible way).
Note: This document was published by the PDF Association and is subject to Creative Commons Attribution 4.0 International LicenseVersion 1.0.1 of the manual can be downloaded below in English.