<https://blog.bricsys.com/ja/%e9%ac%bc%e3%81%94%e3%81%a3%e3%81%93/%e3%83%91%e3%83%a9%e3%83%93%e3%83%ab%e3%83%89/#webpage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://blog.bricsys.com/tag/parabuild/>