require 'rexml/document'
doc = REXML::Document.new
meeting = doc.add_element 'meeting'
meeting_start = Time.local(2006, 10, 31, 13)
meeting.add_element('time', { 'from' => meeting_start,
'to' => meeting_start + 3600 })
doc.children[0] # => ...
puts doc.children[0].children[0]
puts doc.children[0] # =>
puts doc.children[1] # => ...