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<p class="MsoNormal"><span style="font-size:11.0pt">Hi esip-semantictech@<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Looking forward to our meeting on May 26<sup>th</sup>. We have
</span><span style="font-size:11.0pt;color:#1D1C1D;background:#F8F8F8">Xiaogang Ma, Department of Computer Science, University of Idaho presenting as follows.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:11.5pt;font-family:"Arial",sans-serif;color:#1D1C1D;background:#F8F8F8">A new structure for representing and tracking version information in a deep time knowledge graph<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:11.5pt;font-family:"Arial",sans-serif;color:#1D1C1D;background:#F8F8F8">Xiaogang Ma, Department of Computer Science, University of Idaho<o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:11.5pt;font-family:"Arial",sans-serif;color:#1D1C1D;background:#F8F8F8">Abstract</span></b><span style="font-size:11.5pt;font-family:"Arial",sans-serif;color:#1D1C1D;background:#F8F8F8">: Ontologies and vocabularies
are an effective way to promote data interoperability in open data and open science. The deep time knowledge graph is one of the most discussed and studied topics in geoscience ontologies and vocabularies. In this paper we propose a new structure for version
control and tracking of concepts, attributes and topological relationships in the deep time knowledge graph. In our work we have reused the existing ontologies for geologic time scale and vocabularies for the International (Chrono)stratigraphic Chart (ISC).
Through the new structure, we are able to represent the whole version history of the ISC charts (from 2004 to 2018) in a single knowledge graph. Moreover, the resulting knowledge graph is consistent with the existing ontologies and vocabularies. Experiments
of SPARQL queries prove the efficiency of this structure for version tracking of concepts and attributes. We are now extending the knowledge graph with concepts from regional and local geologic time standards, and building a graphic user interface for the
services. In a future work, we will implement the knowledge graph in data integration workflows. We hope this research will spur more discussion and development of methods for version control of knowledge graphs in geoscience and other disciplines.</span><span style="font-size:11.0pt"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt">Our proposed agenda is at<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><a href="https://docs.google.com/document/d/1wMVNI1xuG2uDasMcBxk57y1lSJfq0tKRxDvDXhYmpb8/edit#heading=h.bw0fosq1g7tc">https://docs.google.com/document/d/1wMVNI1xuG2uDasMcBxk57y1lSJfq0tKRxDvDXhYmpb8/edit#heading=h.bw0fosq1g7tc</a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Look forward to seeing you all on the 26<sup>th</sup>.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Lewis<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal" style="line-height:11.65pt"><b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#606062">Dr. Lewis John McGibbney Ph.D., B.Sc. (Hons)</span></b><span style="font-size:11.0pt;font-family:"Times New Roman",serif;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#606062">Enterprise Search Technologist,
</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#7F7F7F">Web and Mobile Application Development Group (172B)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#7F7F7F">Application, Consulting, Development and Engineering Section (1722)<o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:11.65pt"><i><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#606062">Information and Technology Solutions Directorate</span></i><span style="font-family:"Times New Roman",serif;color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:11.65pt"><b><span lang="PT-BR" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#606062">O</span></b><span lang="PT-BR" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#606062"> (818) 393-7402 | <b>M</b> (626)
487-3476</span><span lang="PT-BR" style="font-family:"Times New Roman",serif;color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:11.65pt"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"><a href="https://jpl.webex.com/meet/lmcgibbn"><span lang="PT-BR" style="color:#0563C1">https://jpl.webex.com/meet/lmcgibbn</span></a></span><span lang="PT-BR" style="font-family:"Times New Roman",serif;color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;line-height:11.65pt"><span lang="PT-BR" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"> </span><span lang="PT-BR" style="font-family:"Times New Roman",serif;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#606062">JPL</span></b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#606062"> | jpl.nasa.gov</span><o:p></o:p></p>
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