STC in VOResource records

[Arnold Rots]

Hm, if I read the definition of xs:ID correctly, even slashes and
colons are not allowed.

Happy New Year (what a way to start it off!),

  - Arnold

Ray Plante wrote:
> Hi Kevin and WG,
> 
> I'll go ahead and declare a ruling on this one.  For reference, the 
> problem being addressed is summarized in 
> http://www.ivoa.net/forum/registry/0612/1764.htm.  If there is any 
> objection, please speak up pronto!
> 
> A publishing registry shall be responsible for creating IDs within STC 
> descriptions which are globally unique.  The convention for doing this 
> will be to use an ID of the following form:
> 
>     <resource's authority id>/<resource's resource key>:<coordsys key>
> 
> For example, if the resource being described has an IVOA id of 
> "ivo://adil.ncsa/adil", then the following can be used as an internal STC 
> id refering to the UTC-FK5-TOPO standard system:
> 
>     adil.ncsa/adil:UTC-FK5-TOPO
> 
> The STC snippet, then, would look like this:
> 
>      <stc:STCResourceProfile
>           xmlns="http://www.ivoa.net/xml/STC/stc-v1.30.xsd">
> 
>         <AstroCoordSystem xlink:type="simple"
>                           xlink:href="ivo://STClib/CoordSys#UTC-FK5-TOPO"
>                           id="adil.ncsa/adil:UTC-FK5-TOPO"/>
> 
>         <AstroCoordArea coord_system_id="adil.ncsa/adil:UTC-FK5-TOPO">
>            <AllSky/>
>         </AstroCoordArea>
> 
>      </stc:STCResourceProfile>
> 
> If you have objections to this, please speak up now.
> 
> I will note that I have discussed with Arnold a change to the STC schema 
> which would, for practical purposes, eliminate this problem in the context 
> of the registry (and other similar applications like VOEvent).  This 
> alternative was suggested in part by Ed Shaya (see 
> http://www.ivoa.net/forum/registry/0612/1773.htm).  It uses XLink for both 
> internal and external linking.  In the rare case in which a non-standard 
> coordinate system were described (rather than simply referenced) then the 
> above convention would, in principle, still need to be invoked.  Arnold is 
> mulling this idea over.
> 
> cheers,
> Ray
> 
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Arnold H. Rots                                Chandra X-ray Science Center
Smithsonian Astrophysical Observatory                tel:  +1 617 496 7701
60 Garden Street, MS 67                              fax:  +1 617 495 7356
Cambridge, MA 02138                             arots at head.cfa.harvard.edu
USA                                     http://hea-www.harvard.edu/~arots/
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