What is used to define a query in a stream processing jobs in Azure Stream Analytics?

Azure Stream Analytics jobs use a SQL-like query language, known as Stream Analytics Query Language, to define the logic for analyzing, transforming, and outputting streaming data.

XML (Extensible Markup Language) is a markup language used for encoding documents, not for defining queries in Azure Stream Analytics.

YAML (YAML Ain't Markup Language) is a human-friendly data serialization standard, commonly used for configuration files, but not for defining stream processing queries in Azure Stream Analytics.

KOL is not a recognized query language or standard used in Azure Stream Analytics; the language used is SQL-based.