<http://schema.org/description>
"Despite being a unique, key marketing feature of Snow Leopard, Apple has decided to open the code behind Grand Central Dispatch under the liberal Apache 2.0 license."^^<http://www.w3.org/2001/XMLSchema#string>
<http://appleinsider.com/articles/09/09/11/apple_open_sources_snow_leopards_grand_central_dispatch>