Rule
ATLAS rules or atl files follow YAML syntax. It has at most 4 keys: meta, modules, scripts and chain.
meta:
name: "Hello World"
description: "Traditional way to start."
version: "1.0"
chain:
printer_subchain:
input: 'Hello World, P.S. ATLAS.'
func: printer
Note
chain is the only section that a valid rule must contain.