DataWeave 2.2 is compatible and bundled with Mule 4.2. Standard Support for Mule 4.2 ended on May 2, 2021, and this version of Mule will reach its End of Life on May 2, 2023, when Extended Support ends.

Deployments of new applications to CloudHub that use this version of Mule are no longer allowed. Only in-place updates to applications are permitted.

MuleSoft recommends that you upgrade to the latest version of Mule 4 that is in Standard Support so that your applications run with the latest fixes and security enhancements.

xsiType(String, Namespace)

Creates a xsi:type type attribute. This method returns an object, so it must be used with dynamic attributes.

Introduced in DataWeave 2.2.2. Supported by Mule 4.2.2 and later.


Name Description


The name of the schema type that is referenced without the prefix.


The namespace of that type.


This example shows how the xsiType behaves under different inputs.


%dw 2.0
output application/xml
ns acme http://acme.com
      user @((xsiType("user", acme))): {
          name: "Peter",
          lastName: "Parker"


<?xml version='1.0' encoding='UTF-8'?>
 <user xsi:type="acme:user" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:acme="http://acme.com">

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