<https://www.conceptfiresec.com/post/securing-your-business-understanding-the-different-security-systems-for-a-physical-location>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.conceptfiresec.com/post/securing-your-business-understanding-the-different-security-systems-for-a-physical-location>