Those are the consumer terms. Devs and publishers would instead have to look at the approval terms. (http://developer.apple.com/appstore/guidelines.html)

And lo & behold, I give you Section 11.13: "Apps can read or play approved content (magazines, newspapers, books, audio, music, video) that is sold outside of the app"... yadda, yadda.

Sounds like a definition of "content" to me...