I'm in the process of creating a album-based webpage and now in the process of providing Schema.org annotations (using Microdata) for element as needed. The only element I'm having trouble labeling are the numeric representations of tracks, or track number.
I've searched through Schema.org's array of options for music records but had no luck finding anything. Is there a property that I'm overlooking that is best suited for numeric list values?
<div itemscope itemtype="http://schema.org/MusicRecording"> <div itemprop="track"> <span>01</span> <!--Here's an example of what I'm referring to --> <span itemprop="name"">Track 1</span> <time datetime="PT2M30S">2:30</time> </div> <div itemprop="track"> <span>02</span> <span itemprop="name"">Track 2</span> <time datetime="PT3M0S">3:00</time> </div> ... </div>