* either part of Texinfo source code output
* or XBEL (http://xbel.sourceforge.net/, https://en.wikipedia.org/wiki/XBEL)
* or OPML (http://dev.opml.org/, https://en.wikipedia.org/wiki/OPML)
* either part of Texinfo source code output
* or XBEL (http://xbel.sourceforge.net/, https://en.wikipedia.org/wiki/XBEL)
* or OPML (http://dev.opml.org/, https://en.wikipedia.org/wiki/OPML)