<simpleType name="AmplificationFunctionEnumType">
  <restriction base="string">
    <enumeration value="exponential">
      <annotation>
        <documentation>The gain rises exponentially with time after the impact.</documentation>
      </annotation>
    </enumeration>
    <enumeration value="linear">
      <annotation>
        <documentation>The gain rises linearly with time after the impact.</documentation>
      </annotation>
    </enumeration>
    <enumeration value="none">
      <annotation>
        <documentation>No amplification is applied.</documentation>
      </annotation>
    </enumeration>
  </restriction>
</simpleType>