Re: [thredds] <dataSize> embedded within <metadata> within <dataset> not picked up by NetCDF-Java Library.

• To: Hannah Wilcox <hannah@xxxxxxxx>
• Subject: Re: [thredds] <dataSize> embedded within <metadata> within <dataset> not picked up by NetCDF-Java Library.
• From: Ethan Davis <edavis@xxxxxxxxxxxxxxxx>
• Date: Fri, 29 Feb 2008 13:49:08 -0700

Hi Hannah,

Hannah Wilcox wrote:

Hello!

I am using the NetCDF-Java Library to parse TDS configuration THREDDS catalogs and I've run into a sticky point that I'm hoping you can help sort out. I have an example TDS configuration file which I can read in and validate using the NetCDF-Java Library, but a certain piece of information I'm expecting to see is either NOT there, or in a place I'm not looking. The piece of information is a dataSize for a dataset. The twist here is that the dataSize is embedded within a metadata tag thusly:

<dataset name="Atmosphere" ID="cgcm3.1_t47_atmos" serviceName="gridded">

                                 <metadata inherited="false">

<dataSize units="Kbytes">439.78</dataSize>

                                 </metadata>
                        </dataset>

The specification says that a <dataset> can contain an element of the threddsMetadataGroup which contains <metadata> and <metadata> can contain elements of the threddsMetadataGroup which includes <dataSize>. However when I look at the InvDatasetImpl that this example produces, getDataSize() returns 0.0 and I cannot see the size in any of the metadata structures.

My questions are:

-  Is this a valid structure?

Yes, it is valid.

- If it is a valid structure, is there a reason the size element of an InvDatasetImpl is not populated with the dataSize from this structure?

Oops, that's a bug. We'll get a fix out soon.

Ethan

- If it isn't a valid structure, can that somehow be noted or changed in the specification?

Thanks for your time,


Hannah Wilcox

Software Engineer in the VETS group
hannah@xxxxxxxx
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Ethan R. Davis                                Telephone: (303) 497-8155
Software Engineer                             Fax:       (303) 497-8690
UCAR Unidata Program Center                   E-mail:    edavis@xxxxxxxx
P.O. Box 3000
Boulder, CO  80307-3000                       http://www.unidata.ucar.edu/
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• References:
  • [thredds] <dataSize> embedded within <metadata> within <dataset> not picked up by NetCDF-Java Library.
    • From: Hannah Wilcox