Some other examples of OWFa license:

• Mozilla prefers it for standards – especially when combined with CC0: https://wiki.mozilla.org/Standards/license#CC0_OWFa_Preferred
• Lots of examples: http://www.openwebfoundation.org/faqs/users-of-owf-agreements

Great to see the work done on the OWFa +7 years ago to enable open reusable specifications be picked up and used to make things like GraphQL available for all, without risking any patent infringements from the people behind it.