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<p class="MsoNormal"><span style="font-family:"Andale Mono"">For the origin story of GCMD and its roots in the NASA Master Directory (ca. 1988) and IDN (ca. 1990), see: https://idn.ceos.org/newsletter/newsletter15.html<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.0pt;font-family:Monaco;color:black">—<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.0pt;font-family:Monaco;color:black">Christopher Lynnes NASA/GSFC mobile: 410-231-4573<br>
“Perfection is achieved, not when there is nothing more to add, but when there is nothing left to take away.” A. de St. Exupery</span><span style="font-family:"Andale Mono""><o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-left:.5in">On 5/28/21, 12:13, "esip-semanticweb on behalf of Siri Jodha Khalsa via esip-semanticweb" <<a href="mailto:esip-semanticweb-bounces@lists.esipfed.org">esip-semanticweb-bounces@lists.esipfed.org</a> on behalf of
<a href="mailto:esip-semanticweb@lists.esipfed.org">esip-semanticweb@lists.esipfed.org</a>> wrote:<o:p></o:p></p>
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<p style="margin-left:.5in">Hello Mark, Ruth and Øystein -<o:p></o:p></p>
<p style="margin-left:.5in">Thanks for a well-reasoned, somewhat provocative essay. It deserves to get widely read. An appropriate journal doesn't leap to mind, but I suspect others will have suggestions.<o:p></o:p></p>
<p style="margin-left:.5in">I was working in the EOSDIS Core System Science Office before launch of the first EOS satellite and from what I recall GCMD and EOSDIS began and evolved somewhat in parallel. The motivation for GCMD was to "facilitate interactions
among science data cataloging systems" and it was the Committee on Earth Observing Satellites Data Working Group (CEOS-DWG) that sponsored the initial implementation of the International Directory Network (IDN) which became the GCMD. I may not have the exact
details correct, but the statement "The GCMD was developed to support the launch of ... EOS." is probably incorrect.<o:p></o:p></p>
<p style="margin-left:.5in">Also of interest, and perhaps worth noting, is that initially the GCMD had "Socioeconomic" keywords contributed by CIESIN. These included, e.g.
<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><span style="font-family:"Courier New"">Population Dynamics > Demographic Characteristics > ethnicity</span><br>
<span style="font-family:"Courier New"">Human Attitudes, Preferences, and Behavior > Social Behavior > resistance to change</span><br>
<span style="font-family:"Courier New"">Human and Environmental Health > Physiological Parameters > digestive physiology
</span><br>
<span style="font-family:"Courier New"">Environmental Protection > Biota > plankton</span><o:p></o:p></p>
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<p style="margin-left:.5in">which might have covered some of the needs in IPY, but I don't know what happened to these keywords. Also, note that originally, and for many years, there were only what is now called "science keywords" but at that time was called
the "GCMD Parameter Valids".<o:p></o:p></p>
<p style="margin-left:.5in">In terms of "lessons learned", it might be worth discussing the reasons behind the observation that "SWEET has also not been broadly embraced by Earth science data centers as a standard ontology or vocabulary service."<o:p></o:p></p>
<p style="margin-left:.5in">If and when you do submit the paper to a journal, you're welcome to suggest me as a reviewer.<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in">Best wishes,<br>
SiriJodha<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">On 5/27/21 4:07 PM, Mark Parsons via esip-semanticweb wrote:<o:p></o:p></p>
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<pre style="margin-left:.5in">Dear Semanticists,<o:p></o:p></pre>
<pre style="margin-left:.5in"><o:p> </o:p></pre>
<pre style="margin-left:.5in">Some of you may be interested in this ethnographic tale of the development and evolution of the GCMD keywords.<o:p></o:p></pre>
<pre style="margin-left:.5in"><o:p> </o:p></pre>
<pre style="margin-left:.5in">We would welcome any feedback on the essay, including possible journal suggestions for where it could be submitted.<o:p></o:p></pre>
<pre style="margin-left:.5in"><o:p> </o:p></pre>
<pre style="margin-left:.5in">Parsons, Mark A., Duerr, Ruth, & Godøy, Øystein. (2021). The Evolution of GCMD Keywords — An instructive tale of data standards development and adoption. <a href="https://gcc02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdoi.org%2F10.5281%2Fzenodo.4818237&data=04%7C01%7Cchristopher.s.lynnes%40nasa.gov%7Cd7bfc8f495c244ea17b308d921f2f8f3%7C7005d45845be48ae8140d43da96dd17b%7C0%7C0%7C637578152326306701%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000&sdata=puc20GiIQRJjfWJhq%2F40854shh8MTHVvDZzQpym5Lp0%3D&reserved=0">http://doi.org/10.5281/zenodo.4818237</a><o:p></o:p></pre>
<pre style="margin-left:.5in"><o:p> </o:p></pre>
<pre style="margin-left:.5in">Abstract <o:p></o:p></pre>
<pre style="margin-left:.5in">NASA established the Global Change Master Directory (GCMD) and supporting keywords in the early 1990s as part of implementing the GCMD through the Directory Interchange Format or DIF. The GCMD was developed to support the launch of the huge and enduring satellite-based Earth Observing System (EOS). The primary intent was to catalog EOS and related data, but the keywords have been implemented in many different systems and adopted in varying ways by many different organizations around the world. This essay provides an ethnographic examination of how the keywords have evolved and been managed and how they have been adopted over the last few decades. It illustrates how semantic approaches have evolved over time and provides insights on how standards and associated processes can be sustained and adaptable. Ongoing institutional commitment is essential, but so is transparency and technical flexibility. Understanding the different roles involved in standards creation, maintenance, and use of standards as well as the services that standards enable is also critical. It is apparent that semantic representations need to be mindful of different contexts and carefully define verbs as well nouns and categories. Understanding and representing relationships is central to interdisciplinary interoperability.<o:p></o:p></pre>
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<pre style="margin-left:.5in">cheers,<o:p></o:p></pre>
<pre style="margin-left:.5in"><o:p> </o:p></pre>
<pre style="margin-left:.5in">-m. <o:p></o:p></pre>
<pre style="margin-left:.5in"><o:p> </o:p></pre>
<pre style="margin-left:.5in"><o:p> </o:p></pre>
<pre style="margin-left:.5in">Mark A. Parsons<o:p></o:p></pre>
<pre style="margin-left:.5in">Research Scientist<o:p></o:p></pre>
<pre style="margin-left:.5in">University of Alabama in Huntsville<o:p></o:p></pre>
<pre style="margin-left:.5in">+1 303 941 9986<o:p></o:p></pre>
<pre style="margin-left:.5in">Mail: 1550 Linden Ave, Boulder, CO 80304, USA<o:p></o:p></pre>
<pre style="margin-left:.5in"><a href="https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Forcid.org%2F0000-0002-7723-0950&data=04%7C01%7Cchristopher.s.lynnes%40nasa.gov%7Cd7bfc8f495c244ea17b308d921f2f8f3%7C7005d45845be48ae8140d43da96dd17b%7C0%7C0%7C637578152326306701%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000&sdata=s8%2FLg373f%2FHhM%2F%2FWng0rn9dorAPZybDAE%2BpIYd%2BFpzg%3D&reserved=0">https://orcid.org/0000-0002-7723-0950</a><o:p></o:p></pre>
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<pre style="margin-left:.5in"><o:p> </o:p></pre>
<pre style="margin-left:.5in">_______________________________________________<o:p></o:p></pre>
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<pre style="margin-left:.5in">-- <o:p></o:p></pre>
<pre style="margin-left:.5in">Siri-Jodha Singh KHALSA, Ph.D., SMIEEE<o:p></o:p></pre>
<pre style="margin-left:.5in">National Snow and Ice Data Center<o:p></o:p></pre>
<pre style="margin-left:.5in">University of Colorado<o:p></o:p></pre>
<pre style="margin-left:.5in">Boulder, CO 80309-0449 <o:p></o:p></pre>
<pre style="margin-left:.5in">Traditional Territories of the Arapaho, Cheyenne and Ute Nations<o:p></o:p></pre>
<pre style="margin-left:.5in">Office: 1-303-492-1445 GV: 1-303-736-9976 EU: +420 608 720 281<o:p></o:p></pre>
<pre style="margin-left:.5in"><a href="https://gcc02.safelinks.protection.outlook.com/?url=http%3A%2F%2Forcid.org%2F0000-0001-9217-5550&data=04%7C01%7Cchristopher.s.lynnes%40nasa.gov%7Cd7bfc8f495c244ea17b308d921f2f8f3%7C7005d45845be48ae8140d43da96dd17b%7C0%7C0%7C637578152326316656%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000&sdata=ZJDEm4N62zpfaoz%2BPG8U2xWKoIKWjzdL6ZtyN%2Bh%2FBkg%3D&reserved=0">http://orcid.org/0000-0001-9217-5550</a><o:p></o:p></pre>
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