<https://www.pediatriccommons.org/do-you-need-service-provider-to-build-ios-talkroute-voip-app/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.pediatriccommons.org/do-you-need-service-provider-to-build-ios-talkroute-voip-app/>