Snippet to embed contact data in a web page so that an iOS device can recognise text as a phone number or as contact data. Use the 'itemprop' attribute, although you can also wrap the div in a 'vcard' class, and setting the class of the phone number span to 'tel' seemed to do funky things too:
<div itemscope>
<span itemprop="name">Rob Carr</span>
<a class="nowrap" href="mailto:rob@google.com" itemprop="email">rob@google.com</a>
<span class="nowrap" itemprop="tel">+44 1234 567 890</span>
</div>