XQuery Add in XML

How to Add or Insert Nodes Using XQuery?

XQuery itself is primarily a query language to retrieve and transform XML data. It doesn’t directly modify XML documents like an update language, but with XQuery Update Facility extension, you can perform insertions and modifications.

Adding Nodes Using XQuery Update Facility

• The XQuery Update Facility extends XQuery with update operations like insert node.

• It allows you to add new elements, attributes, or text nodes into an existing XML document.

Syntax to Add (Insert) Nodes

insert node <newNode>Content</newNode> into /path/to/parent

Example

Assume this XML:

<library>  <book>    <title>The Hobbit</title>  </book></library>

To add a new <author> element inside the <book> node:

insert node <author>J.R.R. Tolkien</author> into /library/book

Resulting XML after update:

<library>  <book>    <title>The Hobbit</title>    <author>J.R.R. Tolkien</author>  </book></library>

Important Notes:

• XQuery Update is supported in some XML database systems or processors (e.g., BaseX, eXist-db).

• Standard XQuery (without Update Facility) only supports querying and transformation, not direct updates.

If you want, I can help you with examples on adding or updating XML data using XQuery Update or alternatives!