Apple News Format
Apple (via Federico Viticci):
Apple News Format is the custom JavaScript Object Notation (JSON) document format for News content. With Apple News Format, you can create beautifully crafted layouts with iOS fonts, rich photo galleries, videos, and animations—all optimized for iPhone, iPad, and iPod touch.
See also: Facebook Instant Articles, Google’s Accelerated Mobile Pages.
The videos in this document for the animations illustrations should have been slowed down because some of them are not very instructive:
https://developer.apple.com/library/ios/documentation/General/Conceptual/Apple_News_Format_Ref/AppearAnimation.html#//apple_ref/doc/uid/TP40015408-CH52-SW1