<http://vectorworks-bim.com/2016/03/17/%e9%ab%98%e3%81%95%e3%81%ae%e7%a2%ba%e8%aa%8d/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://vectorworks-bim.com/2016/03/17/%E9%AB%98%E3%81%95%E3%81%AE%E7%A2%BA%E8%AA%8D/>