November 9, 2005 Koen Vervloesem REXML (Ruby Electric XML) is the XML processor of choice for Ruby programmers. It comes bundled with the standard Ruby distribution. It's fast, written in Ruby, and can be used in two ways: tree parsing and stream parsing. In this article, we show some basic constructs on how to use REXML for XML processing. We also introduce the use of Ruby's interactive debugger