Terraform - reserved (reference) keywords

• Resources
  • <RESOURCE TYPE>.<NAME>
• Input Variables
  • var.<NAME>
• Local Values
  • local.<NAME>
• Child Module Outputs
  • module.<MODULE NAME>
• Data Sources
  • data.<DATA TYPE>.<NAME>
• Filesystem and Workspace Info
  • path.module
  • path.root
  • path.cwd
  • terraform.workspace
• Block-Local Values
  • count.index
  • each.key / each.value
  • self

참고)

• https://medium.com/@d3vpasha/reserved-keywords-in-terraform-f37a4cbf3a81
• https://developer.hashicorp.com/terraform/language/expressions/references