NOT part of a democratic constitution:
Laws: Laws define concrete instances of constitutional principles at work in the community; they also (in a democracy) must be comprehensible and as few and simple as possible
Community conventions and recommendations: aside from constitutional principles (must be followed, massive penalty for violation) and laws (must be followed, adequate penalty for violation) communities typically share conventions and recommendations which are not necessarily enforced via a penal system, but should none the less be followed; “convention” transgressions might be punished by social penalties
Form of state: the principles of a constitution ideally only allow for a specific form of “state”, i.e. if a constitution contains principles such as “Freedom” and “Equality”, no other form of governance but a democracy is possible (as a true democracy is the only “equal” form of governance). How this form of state is implemented, is ideally regulated by laws (not by the constitution), and, in a true democracy, can be changed at any time by majority vote by the citizens (in case they are not happy with the system or the choices they can vote for). This enables the citizens to democratically adapt the form of government rapidly to ever changing realities of the world we life in. This option for a rapid adaptation of the system of governance by the people (through democratic means) ensures that no permanent power centers or power monopolies can be formed, to allow a minority to dominate/rule the majority.