I'm looking for user experience guidelines for orientation of mobile apps

I presume that re-orientating a mobile device should show more or less the same information but hypothetically it could change the screen completely. For example, a games programmer could choose to combine two games selected by orientation. This feels wrong to me but I would 开发者_开发知识库like some published guidelines specifically concerning orientation as well as your opinions please.

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Check out this document: Apple User Interface Guidelines

Of course, it's apple specific to their requirements for app acceptance, but I think it's very insightful to what a user expects from orientation changes and what you should try to provide and can be useful to any mobile developer.

Edit: start at the bottom of page 58 :) This thing's real long.