External Tools report format

Hi all,

In IntelliJ, we can set up External Tools to run, and they can return their output in a format that IntelliJ can parse, to display messages, complete with line numbers, file names, and links.

Does anyone know where to find the documentation for that output file format, i.e. what structure IntelliJ expects? Is it XML, JSON, or something else? Is there a schema?

Brgrds,

Christian