Which language is used for writing expressions in DataWeave?

DataWeave uses its own specific language, known as the DataWeave Expression Language (DWEL), for writing expressions. This language is designed to transform and query data in a variety of formats, such as JSON, XML, CSV, and more. It enables developers to create complex transformations easily, bringing together data from different sources and providing a powerful syntax tailored for data manipulation.

In contrast to the other languages listed, such as JavaScript, Python, and SQL, which are used in different contexts and applications, DWEL is uniquely structured for use within MuleSoft's Anypoint Platform. Its capabilities are optimized for integration tasks, making it an essential part of any DataWeave-related work. By using DWEL, users can leverage built-in functions and operators specifically designed for data transformation, making it the best choice for writing expressions within that system.