Summary:  The purpose of this use-case is to represent the general case where there may be some sort of DataStore which recieves updates on a periodic basis through some manner of polling.  When an update is recieved, the binders should automatically update the view/widget items bound to data contained within the DataStore. 

A specific example would be a feed SataStore for items such as an ATOM or RSS feed.  These types of data have defined intervals at which feed updates are made.  The datastore implementation could use the interval data to periodically poll for updates.  When an update is recieved, the binders connected to the datastore data will need a method by which to be automatically notifed, such as a standardized topic to listen on.

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Declarative:

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Discussion: