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Proposal: Logical Split, Physical Join Logically, there are three policy documents What to do when you get a SUBSCRIBE “Subscription Policy” How to generate a document when an input changes “Composition Policy” How to filter a document for privacy “Privacy Policy” Each policy document has conditions, actions and transformations specific to it Each policy document has conditions, actions and transformations applicable to all Use XML namespaces to indicate which conditions, actions, transformations are for subscription, composition or filter policy |