Brainstorming yet another potential YAML DSL for C4 models; see https://twitter.com/flaximus/status/1271107910928666625

model_01.yaml

people:
  customer:
    name: Personal Banking Customer
    description: A customer of the bank, with personal bank accounts

enterprises:
  Big Bank PLC:
    people:
      support:
        name: Customer Service Staff
        description: Customer sevice staff within the bank
      backoffice:
        name: Back Office Staff:
        description: Administration and support staff within the bank
    systems:
      internet:
        name: Internet Banking System:
        description: Allows customers to view information about their bank accounts        
      mainframe:
        name: Mainframe Banking System
        description: Stores all of the core banking information about customers and accounts
        tags:
          - Existing System
      email:
        name: E-mail System
        description: The internal Microsoft Exchange e-mail system
        tags:
          - Existing System
      atm:
        name: ATM
        description: Allows customers to withdraw cash
        tags:
          - Existing System

relationships:
  atm:
    Uses: mainframe
  backoffice:
    Uses: mainframe
  customer:
    Withdraws cash using: atm
    Views account balances, and makes payments using: internet
    Asks questions to:
      support:
        via: telephone
  email:
    Sends emails to: customer
  internet:
    Gets account information from, and makes payments using: mainframe
    Sends e-mail using: email
  support:
    Uses: mainframe