The Postel's Law (or Robustness Principle) is related to this, be conservative with what you do (i.e. try to closely adhere to standards for your outputs) and f

The Postel's Law (or Robustness Principle) is related to this, be conservative with what you do (i.e. try to closely adhere to standards for your outputs) and flexible in what you accept (at least up to some point).