More separation

[Tony Linde]

Thanks, Doug, that was what I'd thought - check out the new cut of the model
to see if I've represented it right.

Cheers,
Tony.  

> -----Original Message-----
> From: Doug Tody [mailto:dtody at nrao.edu] 
> Sent: 17 December 2004 20:03
> To: Tony Linde
> Cc: registry at ivoa.net
> Subject: RE: More separation
> 
> >From Tony:
> > Do we need a term intermediate between service and interface? In my 
> >model, I  had a service providing access to a data collection and 
> >assumed that such a  service could be of the sub-types Ray 
> mentions but 
> >that a single such  sub-type service might be accessed in different 
> >ways, e.g. cgi or web  service (or have an interactive 
> interface). It 
> >was the latter that I thought  could be a repeating group element in 
> >the service definition rather than a  separate resource.
> 
> This separation of service and interface is what we have 
> always had in mind for DAL.  Ideally the basic functionality 
> of the service can be available via more than one interface, 
> e.g., cgi or web service.  Some advanced capabilities such as 
> SSO authentication or ADQL might only be available via a web 
> service interface.  A service is not limited to serving up 
> one data collection, nor is a data collection available via 
> only one service.
> 
> Doug
>