CreatorDID

[Gerard]

Thanks Doug, that is helpful

> ...  For older data, or replicated data which one does not
> control, this may not be possible, and the CreatorDID should be omitted.
> ... To define a CreatorDID, the data creator needs to register
> an authority ID, then they can assign unique identifiers.

It would be nice if the SSA specification would mention this explicitly.

Gerard

> 
> 	- Doug
> 
> 
> On Wed, 1 Aug 2007, Gerard wrote:
> 
> >
> >
> > Dear Doug
> >
> > We have problems understanding how to assign values to the CreatorDID in
> the
> > SSA protocol.
> >
> > >From the text we understand that this is an identifier assigned to a
> dataset
> > (here a spectrum) by the creator of the data.
> > In our case, where we provide access to archived spectra, we understand
> this
> > to mean an id assigned by the astronomer(s) who created these spectra.
> >
> > We also understand that the CreatorDID should be an "IVOA dataset
> > identifier", ie have a form following the Resource Identifier syntax,
> i.e. a
> > URI starting with ivo:// .
> >
> > Our creators have not assigned such an id to their spectra. So what
> should
> > we do ?
> >
> > Thanks
> >
> > Gerard Lemson
> >