Swartz - sgml/signature GitHub Wiki

https://archive.org/details/TheInternetsOwnBoyTheStoryOfAaronSwartz

https://www.computerhope.com/jargon/m/markdown.htm

https://openlibrary.org/authors/OL7167953A/Aaron_Swartz

http://www.aaronsw.com/weblog/openlibrary

https://en.wikisource.org/wiki/Page:Aaron_Swartz_s_A_Programmable_Web_An_Unfinished_Work.pdf/43

https://www.morganclaypool.com/doi/pdf/10.2200/S00481ED1V01Y201302WBE005

https://tools.ietf.org/html/draft-swartz-rdfcore-rdfxml-mediatype-05

http://www.aaronsw.com/2002/rss30

https://communitywiki.org/wiki/RSS_3.0

http://r3r.sourceforge.net/rss3-spec.xhtml