<PopulateCache name='CP-1'>
  <Source>variable.containing.value</Source>
  <Scope>proxy</Scope>
  <CacheKey>
    <KeyFragment ref='variable.containing.keyfrag' />
  </CacheKey>
  <ExpirySettings>
    <TimeoutInSeconds ref='duration_variable'>300</TimeoutInSeconds>
  </ExpirySettings>
</PopulateCache>
