Transform expression and updating expressions

To update existing XML data with Db2 XQuery, use updating expressions within the modify clause of a transform expression.

Use of updating expressions in a transform expression
Db2 XQuery updating expressions must be used in the modify clause of a transform expression. The updating expressions operate on the copied nodes created by the copy clause of the transform expression.
Transform expression
A transform expression creates copies of one or more nodes. Updating expressions in the modify clause of the transform expression change the copied nodes. The expression in the return clause specifies the result of the transform expression.
Basic updating expressions
Using the four basic XQuery updating expressions, you can create complex updating expressions to update existing XML data. When using Db2 XQuery, updating expressions are used within the modify clause of a transform expression.

Parent topic: Expressions