Icons “Matterhorn Protocol”
With these icons I wanted to visualize the different checkpoints of the Matterhorn Protocol.
Actually, the idea was to use these icons on accessible-pdf.info, but then I discarded this.
The Matterhorn protocol can be used to check whether a PDF document is PDF/UA compliant. PDF/UA is a PDF specification and ISO standard that defines what is required for a PDF to be considered barrier-free and accessible.