<http://schema.org/description>
"CloudFlare uses a great deal of open source and free software. Our   core server platform is nginx (which is released   using a two-clause BSD license) and our   primary database of choice is postgresql   (which is released using their own BSD-like..."^^<http://www.w3.org/2001/XMLSchema#string>
<https://blog.cloudflare.com/open-source-two-way-street/>