Distribution tag (was Re: [ticker-dev] A more personal welcome...)

[Phillips, Matthew]

> Bill Segall wrote:
> 
> > 'Distribution'
> > 
> > I think that it would be desirable to have a field that 
> acts a hint for
> > distribution across federations. Possible values might 
> include: { local,
> > organization, world, secure, classified } etc. This is 
> badly thought out at
> > the moment but I was hoping that by raising it others might have
> > suggestions ...
> 
> this seems like producer specified routing and goes against 
> the content
> based routing of elvin.  if you want to limit distribution, i'd be
> more interested in looking at the interaction of local 
> tickertape messages
> with a adminstratively controlled gateway and the use of keys 
> to enforce
> policy.

I can't see why producers shouldn't include hints as to how useful a message
is to a given domain of use.  Clients can still opt to receive everything if
they want to.

Matthew.