<http://emacoffee.com/2011/07/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://emacoffee.com/2011/07/01/%E4%BB%8A%E6%97%A5%E3%81%8B%E3%82%89%E3%82%B5%E3%83%9E%E3%83%BC%E3%82%BF%E3%82%A4%E3%83%A0%E5%B0%8E%E5%85%A5%EF%BC%81/>