normal task
  - | x(completion date)
  (priority)
  (due date)
  (creation date)
  description

delayed task
  (start date)
  (priority)
  (due date)
  (creation date)
  description

  on update:
    if after start date:
      turn into normal task

formula task
  (when formula)
  (priority)
  (due date)

"update":