Any idea how to markup a floor number with schema.org microdata for a local business' postal address?
<div itemscope itemtype="http://schema.org/LocalBusiness">
<span itemprop="legalName">Company Limited</span>
<div itemprop="address" itemscope itemtype="http://schema.org/PostalAddress">
<div itemprop="streetAddress">Billy Street 100</div>
<div>10th Floor</div>
<div><span itemprop="addressLocality">Paris</span>,
<span itemprop="addressRegion">TX</span>
<span itemprop="postalCode">75462</span></div>
<div itemprop="addressCountry">United States</div>
</div>
</div>
Also, is the above markup semantic?
If there's no floor number, should I use RDFa?