<http://www.flytyingforum.com/index.php?/topic/24288-constructive-criticism/#comment-228081>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://www.flytyingforum.com/index.php?/topic/24288-constructive-criticism/&tab=comments#comment-227812>