For example <div itemscope itemtype=https://schema.org/ExerciseAction>        <meta itemprop=additionalType content=http://www.productontology.org/id/Long-distance_running>    </div>If so, which vocabulary(?) is more descriptive?productontology.orgdbpedia.orgwikipedia.org ?
Do search engines follow the additionalType url in microdata?
seo;html5;microdata;schema.org