These two types of data exchange are unified by providing an embedder model class (TEmbedderModel). TEmbedderModel contains a collection of embedded document components.
When the source model is required to publish the presenter state information along with the model data, it provides an embedder model containing a single embedded document component. This component contains the copied data and presenter state.
If the data exchange is to be a Type 2 data exchange, then the embedded document component has a presenter state. If the data exchange is to be Type 1, then the model used for the exchange doesn't have an embedded document component.
Selections that receive a component need to be able to absorb TEmbedderModel objects.
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