XSL Stylesheet to convert from ADQL to SQL

[Ray Plante]

On Mon, 9 Feb 2004, Tony Linde wrote:
> But we need a complete *set* of schemas to create the ADQL: latest ADQL.xsd,
> coords.xsd and region.xsd. Can someone point us to the definitive downloads
> for all of these. Plus instructions on what needs to be done to 'fix' them
> to work in a local context.

Here's where I understand the definitive versions are.  The actual
caretakers should correct me.

   ADQL:  
      from the VOQL Twiki page,
      http://www.ivoa.net/twiki/bin/view/IVOA/IvoaVOQL,
      click, "Here is the latest ADQL XSD".  This link currently goes
      to: 
          http://skyservice.pha.jhu.edu/devel/AdqlTranslator/ADQLschema.xsd

   coords.xsd, region.xsd:
      The home page for STC is 
      http://hea-www.harvard.edu/~arots/nvometa/SpaceTime.html
      The links to the schemas are found there.  The specific URLs
      are:
          http://hea-www.harvard.edu/~arots/nvometa/coords.xsd
          http://hea-www.harvard.edu/~arots/nvometa/region.xsd

As I mentioned in a previous post, if ADQL depends on STC, STC needs
to start going through the standardization process.  A good start
would be to create a IVOA Twiki page for it.  

As for getting these schemas to work together, try downloading the STC
schemas to the same directory as ADQLschema.xsd.  Then edit the import
statements in ADQLschema.xsd to add the attribute
'schemaLocation="coords.xsd"' and 'schemaLocation="region.xsd"'.  

One more comment (since you replied to the announcement of the
stylesheet post):  the stylesheet only supports a specific form of
Circle.  This is because the spec is unclear about the conversion
of regions between ADQL and SkyQL.  

hope this helps,
Ray