Re: [RAM] revised draft proposed definitions

[Tony Li <tli at cisco.com>]

On Jun 11, 2007, at 8:27 AM, Eliot Lear wrote:

> > Identifier:    An object that is used only for identification,
> >         never for forwarding packets or determining location.
> Just as a matter of principle, I think it's best to define what  
> these things are, rather than what they're not.  Never is a long  
> time, and quite frankly it's not very descriptive.  Better to say  
> something like, "An identifier [or the thing it identifies] may  
> change its location at any time, and may in fact be present in  
> multiple locations."


That still fails the test of describing what things are.  What we  
want is to take a constructive approach:

An identifier is an element of a namespace.  There is a 1:1 mapping  
between the namespace and the entities being enumerated.


> > Locator:    An object that is used only for forwarding packets
> >         or determining location, never for identification.
>
> Same comment only in reverse ;-)  "A locator denotes presence at a  
> specific point in the network.  When one's location within a  
> network changes, one locator changes".


Ok, but a locator does NOT denote reachability.  Thus, a locator is a  
string of bits that indicates a topological location.

Tony

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