Appended is something that will work (and that I showed at the team
meeting in abbreviated form). It has URLs instead of IVO identifiers
but that's a detail.
Roy Williams wrote:
> Arnold
>
> Please excuse me, my schema expertise is not as good as yours, so I
> attempt to sketch some examples.
>
> What I want is to say, for example:
> <AstroCoordSystem
> ID="FK5-UTC-TOPO"
> xlink:href="ivo://stc.ivoa.net/FK5-UTC-TOPO">
> so that any of the VO registries can tell me where to find the precise
> definition of this coordinate system, should that be required.
>
> Another example would be for observatory location. I would want to say:
> <ObservatoryLocation
> ID="Palomar"
> xlink:href="ivo://nvo.caltech.edu/observatories/Palomar">
>
> Is this what you envision?
> Roy
>
> California Institute of Technology
> 626 395 3670
>
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/ --------------------------------------------------------------------------
<?xml version="1.0" encoding="UTF-8"?>
<ObsDataLocation xmlns="http://www.ivoa.net/xml/STC/stc-v1.23.xsd"
xmlns:crd="http://www.ivoa.net/xml/STC/STCcoords/v1.23"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:xlink="http://www.w3.org/1999/xlink"
xsi:schemaLocation="http://www.ivoa.net/xml/STC/stc-v1.23.xsd
http://hea-www.harvard.edu/~arots/nvometa/v1.23/stc-v1.23.xsd">
<ObservatoryLocation id="MyObservatory" xlink:type="simple"
xlink:href="http://www.ivoa.net/xml/STC/STClib/Observatories.xml#MyObservatory"/>
<ObservationLocation>
<AstroCoordSystem id="UTC-FK5-TOPO" xlink:type="simple"
xlink:href="http://www.ivoa.net/xml/STC/STClib/AstroCoordSystems.xml#UTC-FK5-TOPO"/> <crd:AstroCoords coord_system_id="UTC-FK5-TOPO">
<crd:Time unit="s">
<crd:TimeInstant>
<crd:ISOTime>2005-04-15T23:59:59</crd:ISOTime>
</crd:TimeInstant>
<crd:Error>2</crd:Error>
</crd:Time>
<crd:Position2D unit="deg">
<crd:Value2>141 69</crd:Value2>
<crd:Error2Radius>0.05</crd:Error2Radius>
</crd:Position2D>