> On the other hand, there are many other cost types (or 
> "rating criteria", as the ALTO requirements document RFC 6708 
> calls them), where an exact specification how to compute and 
> how to encode them makes sense, e.g.:
> 
> - draft-scharf-alto-vpn-service-00  talks about publishing the
>   geographical location of a data center using ALTO. How excatly
>   do we encode longitude/latitude?   This might fit into two lines
>   of text directly in the IANA registry.

For what it is worth (slightly off-topic in this thread): Approximate 
geographic location is already explicitly mentioned in the ALTO charter 
("Initially the WG will consider: IP ranges to prefer and to avoid, ranked 
lists of the peers requested by the client, information about topological 
proximity and approximate geographic locations.").

IMHO, regarding geographical locations, draft-scharf-alto-vpn-service-00 just 
suggests something that the charter already mentions.

Michael

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