The PRAGMA Web site has a link to a showcase. However, when I open this PDF, it shows just 2 pages with a black menu. It must contain links to other documents, but it does not work. I have tried Evince and Adobe Acrobat. How can I view this showcase?
The links are on the page, click the words (articles, papers, notes, etc.)
Direct links to all 10 showcase PDF documents are here: CONTEXT documentation suite - PDF.
On CONTEXT documentation suite - HTML, more files are available, which are also linked in the PDFs. For example click on a couple of articles and on the right bottom of the web page you can see next and previous buttons for navigating. I mention that because I don't find this intuitive, a simple list for each topic would have been easier. There are 8 articles, but only one is listed on each web page.