<https://globalspex.com/onboarding-emails-7-types-of-emails-your-clients-need-from-you/#Blogposting>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://globalspex.com/onboarding-emails-7-types-of-emails-your-clients-need-from-you/>