The cloned node.
Cloning the XmlDataDocument also clones the System.Data.DataSet schema.
If deep is set to false, the cloned DataSet has no data; that is, no rows.
If deep is set to true, the cloned DataSet is set with the schema and then populated with the data.
See XmlNode.CloneNode(bool) in the XmlNode class to see a table describing how this method behaves with each of the different node types.