<https://www.codeproject.com/Articles/9196/Links-with-arbitrary-text-in-a-RichTextBox>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://schema.org/WebPage>
<https://codeproject.freetls.fastly.net/Articles/9196/Links-with-arbitrary-text-in-a-RichTextBox?msg=1695723>