<https://enstinemuki.com/are-readers-using-your-blogs-search-box-how-to-see-the-keywords-used/#article>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://enstinemuki.com/are-readers-using-your-blogs-search-box-how-to-see-the-keywords-used/>