Next: Reading and writing STC-S descriptions (StcsChans)
Up: Storing AST Objects as XML (XmlChan)
Previous: Storing AST Objects as XML (XmlChan)
The XmlChan class also provides support for reading (but not writing) XML
documents which use a restricted subset of an early draft (V1.20) of the
IVOA Space-Time-Coordinates XML (STC-X) system. The version of STC-X
finally adopted by the IVOA differs in several significant respects from
V1.20, and so the STC-X support currently provided by AST is mainly of
historical interest. Note, AST also supports the alternative ``STC-S''
linear string description of the STC model (see
).
STC-X V1.20 is documented at http://www.ivoa.net/Documents/WD/STC/STC-20050225.html, and the current
version is documented at http://www.ivoa.net/Documents/latest/STC-X.html.
When an STC-X document is read using an XmlChan, the read operation
produces an AST Object of the Stc class, which is itself a subclass of
Region. Specifically, each such Object will be an instance of
StcSearchLocation, StcResourceProfile, StcCatalogEntryLocation or
StcObsDataLocation. See the description of the XmlChan class and the
XmlFormat attribute for further details.
Next: Reading and writing STC-S descriptions (StcsChans)
Up: Storing AST Objects as XML (XmlChan)
Previous: Storing AST Objects as XML (XmlChan)
AST A Library for Handling World Coordinate Systems in Astronomy
Starlink User Note 211
R.F. Warren-Smith & D.S. Berry
24th May 2011
E-mail:ussc@star.rl.ac.uk
Copyright (C) 2009 Science \& Technology Facilities Council