Markus Hofmann wrote:
> 
> Brian,
> 
> > Because both the content originator and the content receiver should be
> > able to veto (say) ad insertion.
> 
> What about services that are executed only on behalf of the content
> receiver? Virus scanning might be one example.
> 
> Other examples might be services that are authorized and performed on
> the REQUEST issued by the content receiver (as opposed to the CONTENT
> itself). Here, it seems sufficient if only the content receiver
> authorizes the service.

Yes, so there might be several classes of operation with different veto
rules.

  Brian

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