<https://secure.gravatar.com/avatar/f03a263ea7e62d8ece80d6185b6eae2f?s=96&amp;d=mm&amp;r=g>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://goenergylink.com/blog/commercial-energy-auditing-101/>