Whether the model has been downloaded and is available locally.
If the model was created offline and needs to be created at the server when the client connects.
If the offline model was deleted, and should be deleted on the sever once the client connects.
The unique id of the model.
Whether the model has been marked for offline availability.
If this record requires synchronization to the server for any reason.
If the model has uncommitted local operations that need to be sent to the server when the client connects.