Time Series Cube DM - IVOA Note

[CresitelloDittmar, Mark]

Jiri,

Just a quick response on this...
Please do not use anything from that Quantity DM document.  That is a dead
internal draft from 2004, and as far as I know, is in no way related to any
ongoing work.
The Dataset and Cube model documents both identify the source of the
Quantity elements
  + model dependency to ivoa base types
  + which defines Quantity objects (simple physical value + unit)
  + the model itself is part of the vo-dml specification (was Appendix F,
now in the normative Section 5 I think)
  + the model spec itself is in volute with the others, and will be
migrated to the ivoa repository with the standard.

Mark


On Sun, Mar 19, 2017 at 4:38 PM, Jiří Nádvorník <nadvornik.ji at gmail.com>
wrote:

>
>
> I completely agree with the "value and error" thing being modeled in a
> separate model which will be used for any data representation. The reason
> why I didn't use the Quantity is that even the Basic Quantity in Quantity
> DM <http://wiki.ivoa.net/internal/IVOA/IvoaDataModel/qty23.pdf> is
> containing frames and CoordSys, making it obligated to know every kind of
> CoordSys that you can think of.
>
> Why does a simple quantity need to know about the whole universe is a
> different question, but I didn't use it because of this.
>
>
>
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