@description



<style>
  h4 {font-size: 17px !important; text-transform: none !important;}
  .syntax { font-family: Consolas, 'Lucida Sans', Courier, sans-serif; color: black; font-size: 85%; }

</style>



This guide has been withdrawn. 
The essential information about this feature
is in the [Structural Directives](guide/structural-directives#ngcontainer) guide.
The original draft has been retained for possible future use.