Status
DataSource
A DataSource is an simply an EventEmitter which emitts a 'dataChanged' event with {added:[], removed:[], updated:[]}
DataSourceListener
A DataSourceListener is an object which has a 'setDataSource' method which
DataLink
A DataLink is both a DataSource, and a DataSourceListener. It listens to a
Chain
Fainlly, a data chain is just the idea of chaining toghether multiple DataLinks. non-linking DataSourceListeners may be hooked in at any point, there could be forking,