STC documents and schemas

[Arnold Rots]

Slight update:

Fixed a bug in coords.xsd.
Fixed carriage returns inxsd files.
Added ChandraSTCResource.xml to illustrate a coverage example.

  - Arnold

Arnold Rots wrote:
> I have posted revised STC schemas and documentation.
> To simplify matters, the schemas assume that they coexist in the same
> working directory, but uncommenting the alternative location will
> work, too.
> 
> Quick summary:
> All polymorphisms are implemented as substitution groups.
> Units are attributes of the Coordinate elements (not the individual
> components).
> There are generalized CoordSys and Coords elements, with
> AstroCoordSystem and AstroCoords the inherited classes, specifically
> for STC.
> AstroCoordSys may actually point to an instantiation that lives in a URL.
> 
> 
> http://hea-www.harvard.edu/~arots/nvometa/stc.xsd
>     STC main schema
> 
> http://hea-www.harvard.edu/~arots/nvometa/coords.xsd
>     STC coordinates schema
> 
> http://hea-www.harvard.edu/~arots/nvometa/region.xsd
>     STC region schema
> 
> http://hea-www.harvard.edu/~arots/nvometa/AstroCoordSystem.xml
>     Example XML document with standard AstroCoordSystem element
>     (to be used as reference substitution)
> 
> http://hea-www.harvard.edu/~arots/nvometa/STC.pdf
>     Working draft
> 
> http://hea-www.harvard.edu/~arots/nvometa/STC_UML.pdf
>     UML diagrams (also include in working draft)
> 
> 
> --------------------------------------------------------------------------
> 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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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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