Transition constraint

A transition constraint is a way of enforcing that the data does not enter an impossible state because of a previous state. For example, it should not be possible for a person to change from being 'married' to being 'single, never married'. The only valid states after 'married' might be 'divorced', 'widowed', or 'deceased'. A transition constraint is a way of enforcing that the data does not enter an impossible state because of a previous state. For example, it should not be possible for a person to change from being 'married' to being 'single, never married'. The only valid states after 'married' might be 'divorced', 'widowed', or 'deceased'.