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    <div class="moz-cite-prefix">On 8/3/2023 4:49 AM, Adam Sotona wrote:<br>
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    <blockquote type="cite" cite="mid:CY4PR1001MB215006F0F950F4C89BBD081B8C08A@CY4PR1001MB2150.namprd10.prod.outlook.com">
      
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              <p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="font-size:12.0pt;color:black">From:
                  </span></b><span style="font-size:12.0pt;color:black">Brian
                  Goetz <a class="moz-txt-link-rfc2396E" href="mailto:brian.goetz@oracle.com"><brian.goetz@oracle.com></a><br>
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                </span><span style="font-size:13.5pt;font-family:"Courier
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                <span style="font-size:13.5pt;font-family:"Courier
                  New"">I am wondering about what is the practical
                  difference between HAZMAT and UNKNOWN</span><span style="font-size:13.5pt;font-family:"Courier
                  New"" lang="EN-US">.<o:p></o:p></span></p>
              <p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:11.0pt" lang="EN-US">Maybe there is
                  no difference, all unknown attributes are HAZMAT, so
                  we may drop UNKNOWN.</span></p>
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    There is definitely a difference, the question is, whether it is
    possible for an attribute to be "unknown" if it has a mapper.  On
    the one hand I kind of like including it here, because then we can
    treat all attributes equally (they all have a mapper) rather than
    "unknown" as a special case, but then we have to do the additional
    (small) change of inflating a do-nothing mapper for every unknown
    attribute we come across.  Which i think is OK.  <br>
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