VariableDefinition scope

Hello

can someone confirm that VariableDefinition's scope is the containing
policy only, and doesn't include policies within the policy?

Example:

<Policy PolicyId="P">

  <VariableDefinition VariableId="V">...

  <VariableDefinition>

  <Policy PolicyId="C">...

 
</Policy>

</Policy>

So, the variable V can be referenced only from within rules and target of policy P, not policy C.

thanks,

argyn