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The node element with @id=1 is copied and subsequently assigned a new QName using the rename expression. Note that the transform expression is the only expression which returns an actual XDM instance as a result. You can therefor use it to modify results and especially DOM nodes. This is a frequent issue beginning users are often confronted with. More on this topic can be found in [[Update#XQUF Concepts|Return Returning Results]].
===Functions===
