[Esip-preserve] [EXTERNAL] File formats and mime types

Stevens, Tyler B. (GSFC-423.0)[KBRwyle] tyler.b.stevens at nasa.gov
Thu Aug 4 08:21:30 EDT 2022

The GCMD has an extensive file/data format/mime type list that NASA DAACs and other organizations use in their metadata and can be used in a faceted search. See
https://gcmd.earthdata.nasa.gov/KeywordViewer/scheme/DataFormat and https://gcmd.earthdata.nasa.gov/KeywordViewer/scheme/MimeType

Each keyword has a persistent UUID, definition, reference, and provenance information. There is also an established governance process for suggesting new keywords.
See https://www.earthdata.nasa.gov/learn/find-data/idn/gcmd-keywords for more details.


Tyler Stevens
KBR | Senior Discipline Engineer, NASA EED-3

Tyler.B.Stevens at nasa.gov

From: Esip-preserve <esip-preserve-bounces at lists.esipfed.org> on behalf of Matthew Mayernik via Esip-preserve <esip-preserve at lists.esipfed.org>
Sent: Wednesday, August 3, 2022 4:23 PM
To: ESIP Preserve List <esip-preserve at lists.esipfed.org>
Subject: [EXTERNAL] [Esip-preserve] File formats and mime types

Hi all,
At NCAR we are wanting to be more consistent in how we record data file formats in metadata. The goal is to potentially enable people to search/filter data sets based on their file formats.

We have a couple of questions about this:

1. Are there standard vocabularies for file formats that you use?
2. Should we be using mime types for this purpose?
3. How do you deal with compressed file formats, such as zip or tar, where the actual file types of the data require more work to determine?

Thanks for any insight!


Matthew Mayernik, Ph.D.
Project Scientist & Research Data Services Specialist
NCAR Library
National Center for Atmospheric Research (NCAR)
University Corporation for Atmospheric Research (UCAR)
Boulder, CO, USA
mayernik at ucar.edu<mailto:mayernik at ucar.edu>
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