Do I need to include a link to the main page in BreadcrumbList microdata?

Question

Google

Hello, I am implementing markup in breadcrumbs.
I am using BreadcrumbList markup.
Tell me, is it worth specifying the main page in the chain?
And what to do with the last inactive crumb of the current page, the validator swears: "It is necessary to specify a value for the item field" - do not mark it up or wrap it in

<span itemid="здесь абсолютная ссылка на материал" itemtype="http://schema.org/Thing" itemscope itemprop="item" >
   <span itemprop="name">Название материала</span>
</span>

Thank you.

Answer 1

It is worth including the main page with an anchor keyword if you want to promote it. If it makes no sense to promote the main one, then don’t include it in crumbs.