> For the complete documentation index, see [llms.txt](https://cortex-docs.paloaltonetworks.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cortex-docs.paloaltonetworks.com/cortex-xdr-5.x/reference-and-developer-docs/cortex-xdr-xql/get-started-with-xql.md).

# Get started with XQL

XQL is the Palo Alto Networks Cortex Query Language used in Cortex XDR.

XQL is the Cortex Query Language. It allows you to form complex queries against data stored in Cortex XDR. This section introduces XQL, and it provides reference information on the various stages, functions, and aggregates that XQL supports.


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