What is a DataWeave expression?

A DataWeave expression is indeed a code snippet written in DataWeave language specifically used to perform data transformations. DataWeave is MuleSoft's powerful data transformation language designed to transform data from one format to another, such as converting JSON to XML or aggregating data from different sources.

In practice, DataWeave expressions allow developers to manipulate data structures, enable format conversions, and apply transformations efficiently within Mule applications. This capability is essential for integrating various systems and ensuring data flows are properly aligned with business needs.

Understanding DataWeave expressions is crucial for any MuleSoft architect, as they are a fundamental part of building Data Transformation components within Mule applications.