This is not properly a feed. Instead, is based on the Print dispatcher (Dispatchers) that converts any of the website pages to PDF file. Is automatically used by the default dispatcher when an URL is appended with /print.pdf after the page URL.
To works, needs the DOMPDF library that is not included by default (is large and un-necessary for the most of the websites). In order to use the dispatcher, you need to download the library here. Then, place the library under core/libraries/externals/dompdf and you’re done:
//Standard page: http://example.org/my-first-page //PDF page: http://example.org/my-first-page/print.pdf
You can manually load the dispatcher to use it as you want in this way:
Back to Framework.