[Esip-documentation] information on related files

Wed Sep 19 11:48:10 EDT 2018

Hello!

There's also this: http://cfconventions.org/Data/cf-conventions/cf-conventions-1.7/cf-conventions.html#external-variables

Apparently this approach is chosen for the CMIP6 data and is lax on the specifics by design. The context where to find files with those referenced external netCDF variables is to be provided in some unspecified manner.

It is possible to include links to related files on THREDDS dataset pages but this is outside of file. The metadata_link keeps the connection in the file but requires that the application code handle ISO XML.

-Aleksandar

On Sep 19, 2018, at 11:32 AM, Armstrong, Edward M (398G) via Esip-documentation <esip-documentation at lists.esipfed.org<mailto:esip-documentation at lists.esipfed.org>> wrote:

Hi:
I would recommend the ACDD attribute “references”:

references

Published or web-based references that describe the data or methods used to produce it. Recommend URIs (such as a URL or DOI) for papers or other references. This attribute is defined in the CF conventions.

In CF global attributes there is also a “comment” attribute where such info could be placed in a generic sense.

I have often thought of this use case too and its an area where ACDD or CF could be improved.

The metadata_link could point to an ISO 19115 record where multiple citations could point to other datasets cleanly.

From: Esip-documentation <esip-documentation-bounces at lists.esipfed.org<mailto:esip-documentation-bounces at lists.esipfed.org>> on behalf of David Neufeld via Esip-documentation <esip-documentation at lists.esipfed.org<mailto:esip-documentation at lists.esipfed.org>>
Reply-To: David Neufeld <david.neufeld at noaa.gov<mailto:david.neufeld at noaa.gov>>
Date: Wednesday, September 19, 2018 at 8:18 AM
To: Nan Galbraith <ngalbraith at whoi.edu<mailto:ngalbraith at whoi.edu>>
Cc: "netcdf-java at unidata.ucar.edu<mailto:netcdf-java at unidata.ucar.edu>" <netcdf-java at unidata.ucar.edu<mailto:netcdf-java at unidata.ucar.edu>>, Johannes Karstensen <jkarstensen at geomar.de<mailto:jkarstensen at geomar.de>>, THREDDS community <thredds at unidata.ucar.edu<mailto:thredds at unidata.ucar.edu>>, "netcdfgroup at unidata.ucar.edu<mailto:netcdfgroup at unidata.ucar.edu>" <netcdfgroup at unidata.ucar.edu<mailto:netcdfgroup at unidata.ucar.edu>>, ESIP Documentation LIst <esip-documentation at lists.esipfed.org<mailto:esip-documentation at lists.esipfed.org>>
Subject: Re: [Esip-documentation] [thredds] information on related files

Hi Nan,

I'd recommend using a 'metadata_link' attribute.

http://wiki.esipfed.org/index.php/Attribute_Convention_for_Data_Discovery_1-3#Additional_Metadata:_metadata_link_attribute

-Dave

On Wed, Sep 19, 2018 at 8:56 AM, Nan Galbraith <ngalbraith at whoi.edu<mailto:ngalbraith at whoi.edu>> wrote:
Hi ESIP, NetCDF, and THREDDS folks -

First, I'm sorry for the cross posting. I have a hard time figuring
out which NetCDF list does what; there are 'best practices' threads
on several lists, interspersed with install and development threads.

The OceanSITES project would like to find the most useful way to
provide a link within a NetCDF file to an external dataset.

> Another piece I am missing ... is an optional field, that link to a
> data DOI. Why? Here's an example: We operate an OceanSITES site off
> the Cape Verdes and the sediment trap data is ... not included in an
> netcdf file but processed and stored elsewhere
> https://doi.pangaea.de/10.1594/PANGAEA.863969

Does THREDDS have a standard way to provide links to related or
co-located data? Is this something we discussed as part of ESIP's
ACDD recommendations? I've been searching through my store
of old messages, and haven't come up with anything.

Thanks very much for any advice on this!

- Nan Galbraith

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* Nan Galbraith        Information Systems Specialist *
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