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xml = %{ <aquarium> <fish color="blue" size="small" /> <fish color="orange" size="large"> <fish color="green" size="small"> <fish color="red" size="tiny" /> </fish> </fish> <decoration type="castle" style="gaudy"> <algae color="green" /> </decoration> </aquarium>} require 'rexml/document' doc = REXML::Document.new xml p doc.elements['//fish'] # => <fish size='small' color='blue'/>