ReStructuredText is a complete rewrite of StructuredText by David Goodger.
More information:
[http://docutils.sourceforge.net/spec/rst/introduction.html An Introduction to ReStructuredText]
[http://docutils.sourceforge.net/docs/rst/quickstart.html A ReStructuredText Primer]
[http://docutils.sourceforge.net/spec/rst/reStructuredText.html ReStructuredText Markup Specification]