IVOADMSpectrum12 < IVOA

   +Comments page for Spectrum 1.2
Spectrum 1.2 is an extension of Spectrum DM in order to support Photometry metadata and time series.

   * Latest version of Spectrum 1.2:
http://www.ivoa.net/internal/IVOA/IVOADMSpectraWP/WD-SpectrumDMv1.2-20110319.pdf

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---++ Comments from the IVOA Community  

   * Comments by IVOA.MarkCresitelloDittmar - 09 Jun 2011<br>
Spectrum 1.1/1.2 DM comments presented at IVOA Interop in Naples: <br>
http://www.ivoa.net/internal/IVOA/MarkCresitelloDittmar/SpectrumDM_1.1_review.pdf

   * IVOA.OmarLaurino: In section 3.2 (Use cases and required fields) it is stated: "MANDATORY means that a document implementing the Spectrum use case must provide a value; however, the value may be UNKNOWN (the value exists but is not known) or N/A (not applicable: for example, RA and DEC for a moving object or absolute time for a theory simulation)." Now, this doesn't take into account the type of the values. For example, RA and DEC are supposed to be serialized as double values, so they can't assume values which are strings. A datatype specific value should be provided for these cases, e.g. NaN for doubles. However, I find it odd that a mandatory field can actually be unknown or N/A, and I believe it would make sense to make these fields recommended. 

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This topic: IVOA > WebHome > IvoaDataModel > IVOADMSpectrum12
Topic revision: r3 - 2011-07-05 - OmarLaurino