[nickmain]

The last sentence makes it clear that the intent behind this rule is to prevent circumvention of the App Store approval process, not to ban executable code itself.

The rule can be read as ambiguous when it comes to executable content that is not part of an app, just the document type that an app edits and displays. For example - you could think of calculating a formula in a spreadsheet as an example of interpreted code. Apple has no reasonable interest in preventing such apps.

When the documents that an app handles become more app-like, such as games, then Apple might decide to step in. They have left themselves enough slack in the wording of the rule to allow that.

I hope that they make the rule more explicit in a future version of the agreement.