I've been adding all the "recommended" schema.org markup to my sites for awhile now. Most of the schema markup adds value to google searches.
There's other markup though that I've been using and I'm not really sure who actually uses it (search engines, other sites, etc).
Specifically, for this question, I'm wondering about the wordpress related schema.org markup:
<header itemscope itemtype="https://schema.org/WPHeader">
<aside itemscope itemtype="https://schema.org/WPSideBar">
<footer itemscope itemtype="https://schema.org/WPFooter">
Does anyone know what the purpose of this markup is? Does it add SEO value? If so how and where? Thanks!