PIDS11 — semantics of aliases in context of correlation manager

Summary: I think the spec needs some narrative on the semantics of aliases.
Specifically, it fails to point out that the receipt of an alias from a
source domian does not necessarily imply that its value is to be used as an
alias in the correlating domain.

This clarification is important because if a VIP (say, the president) is
anonymous under an alias in a source domain it might be entirely appropriate
to treat that alais as a real name in the correlating domain. Similarly,
the correlating domain should be free to maintain its own alias for persons
independent of source domains.