I would like to add Microdata for my social profiles. I read that I could to add it in this way:
<span itemscope itemtype="http://schema.org/Organization">
<link itemprop="url" href="http://www.your-company-site.com">
<a itemprop="sameAs" href="http://www.facebook.com/your-company">FB</a>
<a itemprop="sameAs" href="http://www.twitter.com/YourCompany">Twitter</a>
</span>
But I have a bid doubt about
<link itemprop="url" href="???????????">
I have my social button (with links to social profiles) in homepage but also in the other pages of my website. So this Microdata would always be present. Therefore it is a mistake to have always:
<link itemprop="url" href="http://www.homepage.com">
so always the same link (homepage), where social button (and Microdata) there will be also in other pages?