Values, value and struct tags

Values let you define data for use while generating scripts

This can help avoid adding in game variables just for holding values. This can save memory within the running game. It can also help when you want to change a value and avoid finding the value everywhere to change it.

Set the value once, use it in mulitple places.

<mission_data version="1.0">
  <values>
    <value CONST_TIMER_SECONDS="30"/>
  </values>
  <start>
    <expand>
      <set_timer name="MyTimer" value="${CONST_TIMER_SECONDS}"/>
    </expand>
  </start>
</mission_data>

<mission_data version="1.0">
  <values>
    <value TIMER_SECONDS="30"/>
  </values>
  <start>
    <expand>
      <set_timer name="MyTimer" value="${CONST_TIMER_SECONDS}"/>
    </expand>
  </start>
</mission_data>