<http://t17.techbang.com.tw/topics/174-m515-sofa-logitech-mouse-the-bottom-of-the-floating-seal-is-not-chaos#>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://t17.techbang.com/topics/174-m515-sofa-logitech-mouse-the-bottom-of-the-floating-seal-is-not-chaos>