<https://www.perceptionsystem.com/blog/fundamentals-of-mobile-apps-in-the-beauty-and-wellness-industry/#primaryimage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.perceptionsystem.com/blog/fundamentals-of-mobile-apps-in-the-beauty-and-wellness-industry/>