Difference: STCMetadataRFC1dot21 (2 vs. 3)

Revision 32005-05-16 - RayPlante

 

Resource Metadata RFC

This document will act as RFC centre for the Space-Time Metadata V1.21 Proposed Recommendation.

In order to add a comment to the document, please edit this page and add your comment to the list below in the format used for the example (include your WikiName so authors can contact you for further information). When the author(s) of the document have considered the comment, they will provide a response after the comment.

Discussion about any of the comments or responses should be conducted on the data model mailing list, dm@ivoa.net.

Comments

  • The following comments affecting the document came from the VOEvent workshop (ArnoldRots - 16 May 2005):
    • Can Name in Coordinate be made optional?
    • What Frames should really be required in AstroCoordSystem?
    • Can the duplication of TimeScale in AstroCoordSystem and AstronTime be avoided?
    • XInclude examples in Appendix C?

  • The following comments affecting the STC-X (schema) implementation came from the VOEvent workshop (ArnoldRots - 16 May 2005):
    • Can Observatory and Observation Locations be uncoupled?
    • Can multiple Observations and multiple coordinates be accommodated in ObsDataLocation?
    • Can AstroCoordArea be made optional in ObservationLocation?
    • Can there be an simpler description for error circles in the case of 2-D spatial coordinate systems?
Added:
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I'm concerned about the amount of "implementation" that has been done to date. Could we have a definitive statement of what is serving as our 2 implementations?

I don't think having some example XML instance documents is sufficient for serving as an "implementation". We need actual software that actually does something with it. Use of STC in SkyNode does qualify; however, I think it is fair to say that this is only partial use. Something like the footprint service would perhaps provide more coverage of the schema. A stylesheet that converts STC into an astronomer-friendly description of a coordinate system, region, etc. would also be useful. It's not until a developer (because users are going to look at this stuff) actually sits down with STC and tries to use it will we understand if the schema does the job.

-- RayPlante - 16 May 2005

 

Responses

  • The four requests from VOEvent affecting the document are reasonable and I will amend the document accordingly. The corresponding modifications to the schema implementation are minor and do not affect the validity of existing documents. ArnoldRots - 16 May 2005

  • As to the four comments from VOEvent on the schema implementation: the last two are minor, while the first two need additional study; none of them affect existing documents. ArnoldRots - 16 May 2005

  • One typo was pointed out and a few suggestions for improvement (use of different units) were made for the examples in Appendix B. These changes will be made. ArnoldRots - 16 May 2005

  • A query from the Catalog group made me realize that 3-D spherical coordinates need to be extended to allow "deg deg Mpc" as units; this will be accommodated. ArnoldRots - 16 May 2005 


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