SOX - Simple Outline XML https://en.wikipedia.org/wiki/Simple_Outline_XML writing: html> xmlns=http://www.w3.org/1999/xhtml head> title> Sample page body> p> A very brief page results in: Sample page

A very brief page

HAML - a compact form of XML/HTML https://en.wikipedia.org/wiki/Haml writing: %p{:class => "sample", :id => "welcome"} Hello, World! - or - %p.sample#welcome Hello, World! results in:

Hello, World!