- it has to be specified on elements with
itemscope
- it is used to reference other properties (=
itemprop
in Microdata)
So this means for you:
- move
itemref
to the Hotel - move
itemprop="branchOf"
to the Organization
Minimal example:
<div itemprop="branchOf" itemscope itemtype="http://schema.org/Organization" id="schema-organization">
<h1 itemprop="name">The Hotel Chain</h1>
</div>
<div itemscope itemtype="http://schema.org/Hotel" itemref="schema-organization">
<h2 itemprop="name">Hotel Location 1</h2>
</div>