# Package de.gebit.integrity.parameter.variables

- Interface Summary
  Interface | Description
  --- | ---
  VariableManager | The variable manager is responsible for keeping track of variable values.
  VariableOrConstantEntityInitialValueDefinitionCallback | Interface for a callback implementation that allows the `VariableManager` to trigger the definition of the (typically initial) value for a given `VariableOrConstantEntity` by someone capable of defining this value (= the implementor of this interface).