# File lib/squish.rb, line 477
def usedPrefixes (text)
  nslist = text.split(/\s+/)
  state='prefix' #Todo: investigate ruby constants mechanism
  content=""
  nslist.each { |item| 
    if state =~ /prefix/
      content=item
      state='for'
    elsif state =~ /for/
      state = 'uri'
    elsif state =~ /uri/
      self.xmlns[content]=item
      content=""
      state = 'prefix'
    elsif 
      puts "TODO: parse USING clause properly!\n"
    end
  }


  return xmlns
end