<http://schema.org/description>
"When Apple finally opens its iPhone and iPod touch to third-party developers early next year, it will employ some extra measures to maintain the security and stability of the mobile platforms, such as requiring a digital signature on each authorized application."^^<http://www.w3.org/2001/XMLSchema#string>
<http://appleinsider.com/articles/07/11/26/apple_vp_third_party_iphones_apps_to_use_digital_signature>