nokogiri (rubygems): Nokogiri (鋸) makes it easy and painless to work with XML and HTML from Ruby. It provides a sensible, easy-to-understand API for reading, writing, modifying, and querying documents. It is fast and standards-compliant by relying on native parsers like libxml2, libgumbo, or xerces. 
Keywords: libxml2|libxslt|nokogiri|ruby|ruby-gem|sax|xerces|xml|xslt