<div dir="ltr">Dear Markus &amp; Semantics WG:<div><br></div><div>After finally giving the document a good read and discussing the topic with other colleagues involved with the development of the Unified Astronomy Thesaurus (UAT), I wanted to bring up some questions about the envisioned role of existing knowledge systems such as the UAT in the proposed standard.  In particular:</div><div><br></div><div>* Given that the UAT exists and is being used as a source for concepts describing the literature and IVOA registry resources, how does the IVOA community see its role, if any, in the new vocabulary specification? <br>* Do you see the UAT as a source of vocabulary for the IVOA to be somehow incorporated in the proposed framework, or is it to be used as an external resource? <br>* If there is going to be an &quot;IVOA UAT version,&quot; what would be the process to coordinate this vocabulary with the further development of the UAT?</div><div><br></div><div>Thanks,</div><div>Alberto</div><div><br><div><br></div>-- <br><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div></div><div><span><div dir="ltr" style="margin-left:0pt"><span><div dir="ltr" style="margin-left:0pt"><table style="border:none;border-collapse:collapse"><colgroup><col width="445"><col width="275"></colgroup><tbody><tr style="height:90pt"><td style="border-width:1pt;border-style:solid;border-color:rgb(255,255,255);vertical-align:top;padding:5pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><font color="#000000" face="Arial"><span style="font-size:12.6667px;white-space:pre-wrap"><b>Alberto Accomazzi</b></span></font></p><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:9.5pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-weight:700;vertical-align:baseline;white-space:pre-wrap">Program Manager and Principal Investigator</span></p><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:9.5pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;vertical-align:baseline;white-space:pre-wrap">NASA Astrophysics Data System</span></p><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:9.5pt;font-family:Arial;color:rgb(0,0,0);font-weight:700;vertical-align:baseline;white-space:pre-wrap">Center for Astrophysics | Harvard &amp; Smithsonian</span></p><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:9.5pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;vertical-align:baseline;white-space:pre-wrap">60 Garden Street | MS 83 | Cambridge, MA 02138</span></p><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:9.5pt;font-family:Arial;background-color:transparent;vertical-align:baseline;white-space:pre-wrap"><img src="https://lh4.googleusercontent.com/iEhls32f3S2RBzoI5DnklqaMcwuTNIBkcE1Q-iS9ixAQX6u-RMkuI-TmME1HmsCOkfAyFN0pWJ88fKnUbr4miiWKzL5NpjWz4SJikHk017WtLMSQNzqKQ9bmzzwgkZVvLNQvmNx-" width="350" height="2"></span><span style="font-size:9.5pt;font-family:Arial;background-color:transparent;vertical-align:baseline;white-space:pre-wrap"><br></span></p><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:9.5pt;font-family:Arial;vertical-align:baseline;white-space:pre-wrap"><a href="http://ads.harvard.edu" target="_blank"><font color="#000000">ads.harvard.edu</font></a></span><span style="font-size:9.5pt;font-family:Arial;vertical-align:baseline;white-space:pre-wrap"><font color="#000000"> | </font><a href="https://twitter.com/adsabs" style="color:rgb(0,0,0)" target="_blank">@adsabs</a><font color="#000000"> | </font><u><a href="https://ui.adsabs.harvard.edu" target="_blank"><font color="#000000">ui.adsabs.harvard.edu</font></a></u></span></p><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:9.5pt;font-family:Arial;vertical-align:baseline;white-space:pre-wrap"><u><a href="https://cfa.harvard.edu" target="_blank"><font color="#000000">cfa.harvard.edu</font></a></u><font color="#000000"> | </font></span><a href="http://cfa.harvard.edu/facebook" target="_blank"><span style="font-size:9.5pt;font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap">Facebook</span></a><span style="font-size:9.5pt;font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap"> | </span><a href="http://cfa.harvard.edu/twitter" target="_blank"><span style="font-size:9.5pt;font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap">Twitter</span></a><span style="font-size:9.5pt;font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap"> | </span><a href="http://cfa.harvard.edu/youtube" target="_blank"><span style="font-size:9.5pt;font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space: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