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    <p>Hi all,</p>
    <p>I have been thinking about this and as I was doing some work to
      provide a case-insensitive ID MetaField, (useful for usernames and
      email addresses), I thought I would have a stab at writing an
      effective keywords MetaField [1].&nbsp; It is still a bit of a work in
      progress, as trying to shoehorn this into the existing EPrints
      framework in a way where repositories could change their keywords
      field from longtext to this new MetaField has been a little
      tricky.&nbsp; I am not overly confident of its database query
      efficiency but I am reasonably confident it is compatible across
      the currently supported database formats.</p>
    <p>The field works based on the premise that there is a separator
      for terms, allowing for multiple word terms.&nbsp; The default
      separator is a comma (,) but this can be set to something else.&nbsp; I
      have allowed searching for terms to be case-insensitive.&nbsp; I think
      that the number of false positives as a result of this will be
      outweighed by the benefit of complex terms being matched even if
      the odd character is wrongly cased, (e.g. <span class="field-item-single">ChadOx1 nCoV-19</span> rather than <span class="field-item-single">ChAdOx1 nCoV-19).</span></p>
    <p><span class="field-item-single">As an example. lets take an
        example where the following keywords are set, using commas as
        term separators:</span></p>
    <p><span class="field-item-single">covid-19, Coronavirus,
        SARS-CoV-2, </span><span class="field-item-single"><span class="field-item-single">ChAdOx1 nCoV-19</span></span></p>
    <p><span class="field-item-single"><span class="field-item-single">A
          search for &quot;covid-19&quot; or &quot;Covid-19&quot; would find a results but
          &quot;covid&quot; would not.&nbsp; Searches for &quot;Coronavirus,covid-19&quot;, </span></span><span class="field-item-single"><span class="field-item-single">&quot;Coronavirus,
          covid-19&quot; and </span></span><span class="field-item-single"><span class="field-item-single">&quot;Coronavirus,&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; covid-19&quot;,
          should all find results.&nbsp; Also, if you searched for &quot;</span></span><span class="field-item-single"><span class="field-item-single">ChAdOx1
          nCoV-19,Coronavirus&quot; you would find a result but &quot;</span></span><span class="field-item-single"><span class="field-item-single">ChAdOx1,nCoV-19,</span></span><span class="field-item-single"><span class="field-item-single">Coronavirus&quot;
          you would not.</span></span></p>
    <p><span class="field-item-single"><span class="field-item-single">Regards</span></span><br>
    </p>
    <p>David Newman<br>
    </p>
    <p>[1] <a class="moz-txt-link-freetext" href="https://eur03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Feprints%2Feprints3.4%2Fissues%2F61&amp;data=01%7C01%7C%7Ce09d442d4b724ac8e5c008d7ffec5ca8%7C4a5378f929f44d3ebe89669d03ada9d8%7C0&amp;sdata=34ltQcgdM4f1vflUZNs0ItS7qmmNVEjNChYEI%2FcmtOM%3D&amp;reserved=0" originalSrc="https://github.com/eprints/eprints3.4/issues/61" shash="KWQmhcvmxpOytcBdCmZNro6FsLeox7zoS3bdRNR80VbG0PvJfV5LKBbvk9P0oqrnAhz9FASZyuZ9nut8YlhZtOGgSP4GZ1es8pPjgfvi0drtOPa00rxbkH3VLWF1YNoOm8SR2mZB9Xp8Ri+APaxDOwPxb9yA37B/SReeThvgxXw=">https://github.com/eprints/eprints3.4/issues/61</a><br>
    </p>
    <div class="moz-cite-prefix">On 30/04/2020 09:55, Christopher
      Gutteridge via Eprints-tech wrote:<br>
    </div>
    <blockquote type="cite" cite="mid:EMEW3|7118a8284418cdb212668ef50510ba4dw3Y9yG14eprints-tech-bounces|ecs.soton.ac.uk|0df15eb9-253a-9d2e-6398-46d74f8f113d@soton.ac.uk">
      
      <p>I don't recall if you can reindex individual fields.<br>
      </p>
      <div class="moz-cite-prefix">On 30/04/2020 09:51, Yuri via
        Eprints-tech wrote:<br>
      </div>
      <blockquote type="cite" cite="mid:EMEW3|6d8dbf3fb7da9a54f26d6558f796a2f9w3Y9rI14eprints-tech-bounces|ecs.soton.ac.uk|bfc7fde6-2d35-2d22-ace0-bc3e24da89e2@alfa.it">
        <p>Thanks for the pointer, maybe a check against a fixed
          vocabulary can be enough.<br>
        </p>
        <p>This also mean reindex all the archive. Is it possible to
          reindex only title and keywords? Full text can be a problem to
          reindex if you've a lot of pdf, for example.<br>
        </p>
        <div class="moz-cite-prefix">Il 30/04/20 10:29, Christopher
          Gutteridge via Eprints-tech ha scritto:<br>
        </div>
        <blockquote type="cite" cite="mid:EMEW3|873b453e06baf3567d21799648f3bbcfw3Y9Va14eprints-tech-bounces|ecs.soton.ac.uk|53088265-0f14-fff8-e573-a29509f22563@soton.ac.uk">
          <p>EPrints makes some decisions on what to index. Those can be
            overridden, if I recall the old magics from the dawn of
            time.</p>
          <p><a class="moz-txt-link-freetext" href="https://eur03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Feprints%2Feprints%2Fblob%2F3.3%2Flib%2Fdefaultcfg%2Fcfg.d%2Findexing.pl&amp;data=01%7C01%7C%7Ce09d442d4b724ac8e5c008d7ffec5ca8%7C4a5378f929f44d3ebe89669d03ada9d8%7C0&amp;sdata=K7r00vnos9nhSjYHA7c%2FEv32np5%2F3wiT1IluLYSHZ9E%3D&amp;reserved=0" originalSrc="https://github.com/eprints/eprints/blob/3.3/lib/defaultcfg/cfg.d/indexing.pl" shash="DmN+lj4VsSqE9feqjApKsPftzKi2mamflYpBt106OBHyBUkqe3OlANhl6r0+Dy4dtjjEqEeImq7NwRRTrjQNSkwdP4OyC9T/nYSxyK8RWWY3W5n+OxGCUaAyZ+tkOH4ajmHPOXgqTtp6kN+DBGK5Ra4kRTI6N+YUUVbdwZ9BGWs=" originalsrc="https://github.com/eprints/eprints/blob/3.3/lib/defaultcfg/cfg.d/indexing.pl" shash="aUQB06ZU/u1ilId8H4hkJFTpVKN663EWAr3kpQiAHEG5PHILwxRH/r5Ql2wYJ&#43;orPeJk2WaXoz3D4rKRBxickDmFO5eFnpRQNb4LPYhmccxU42eFQ79gvAX859e1bFnGxjByqdWwvoE&#43;fo1NQLS9m67tKgij&#43;fppuEd2GMwQTHU=" moz-do-not-send="true" title="Outlook Unmangled from:
https://eur03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Feprints%2Feprints%2Fblob%2F3.3%2Flib%2Fdefaultcfg%2Fcfg.d%2Findexing.pl&amp;data=01%7C01%7Ctotl%40soton.ac.uk%7C2b9294b8ad2646e0fc9c08d7ece40d9c%7C4a5378f929f44d3ebe89669d03ada9d8%7C0&amp;sdata=bGFleEVgoq0JSpPIkC%2F7eyKdbBXb6EUgmx9ari88F3M%3D&amp;reserved=0">https://github.com/eprints/eprints/blob/3.3/lib/defaultcfg/cfg.d/indexing.pl</a></p>
          <p>That, by default, uses EPrints word split function <a class="moz-txt-link-freetext" href="https://eur03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Feprints%2Feprints%2Fblob%2F3.3%2Fperl_lib%2FEPrints%2FIndex%2FTokenizer.pm%23L39&amp;data=01%7C01%7C%7Ce09d442d4b724ac8e5c008d7ffec5ca8%7C4a5378f929f44d3ebe89669d03ada9d8%7C0&amp;sdata=PGG0jf7VQrst2a3OBJ19xMNMb6Lcj2IS3xMhYYCEiqc%3D&amp;reserved=0" originalSrc="https://github.com/eprints/eprints/blob/3.3/perl_lib/EPrints/Index/Tokenizer.pm#L39" shash="lRG80c687nlds9gZ84kwu4LS2/jwWAUSdP5dmQeSqDuwyd+WLnPaFTBfuhQgC0ytfY/e0k/3IbIkr+aZWO0MetEdEKDOXubSMgBAxks522Wfx9vwBLYdql3QR1l8WeSHRJtScF2bRnXRc5+3QOWkCI1LdSu8fAl/EcfEQpXwkd0=" originalsrc="https://github.com/eprints/eprints/blob/3.3/perl_lib/EPrints/Index/Tokenizer.pm#L39" shash="lQ5eoigS9teXR08010I1b5TcD&#43;qEY8a4zyAWA35YCDImAfBTbzr1cbqCEkAngf0EX&#43;vG0AceskDXBENxmWoYuh2VXhLg87o2e0u/LxcCCWEQ&#43;/YgjtNuYsmHtOlTTrGSCk3Gki6iLKQI2vvGwjzJxIBDU/7uNpFKhAVHzZXGsO0=" moz-do-not-send="true" title="Outlook Unmangled from:
https://eur03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Feprints%2Feprints%2Fblob%2F3.3%2Fperl_lib%2FEPrints%2FIndex%2FTokenizer.pm%23L39&amp;data=01%7C01%7Ctotl%40soton.ac.uk%7C2b9294b8ad2646e0fc9c08d7ece40d9c%7C4a5378f929f44d3ebe89669d03ada9d8%7C0&amp;sdata=0HFf7UqOKFoiX%2FdTY02mcmYAsiXRoKUwI6Y2LOiLsXc%3D&amp;reserved=0">https://github.com/eprints/eprints/blob/3.3/perl_lib/EPrints/Index/Tokenizer.pm#L39</a>
            which apparently uses the perl regexp library to decide word
            breaks, but you can write one that does what you want. <span class="pl-c1"><span class="text-bold bg-yellow-light
                rounded-1 d-inline-block">freetext_seperator_chars seems
                utterly ignored now. <br>
              </span></span></p>
          <p><span class="pl-c1"><span class="text-bold bg-yellow-light
                rounded-1 d-inline-block">This is still obeyed </span></span><br>
            <span class="pl-c1"><span class="text-bold bg-yellow-light
                rounded-1 d-inline-block"><span class="pl-smi">$c</span><span class="pl-k">-&gt;</span>{<span class="pl-c1">indexing</span>}<span class="pl-k">-&gt;</span>{<span class="pl-c1">freetext_min_word_size</span>}
                = 3;</span></span></p>
          <p><span class="pl-c1"><span class="text-bold bg-yellow-light
                rounded-1 d-inline-block">Which caused some issues for
                people with Chinese name &quot;Wu&quot;.</span></span></p>
          <p><span class="pl-c1"><span class="text-bold bg-yellow-light
                rounded-1 d-inline-block">I would suggest considering
                keeping it by altering indexing.pl to always index
                numbers even if they are one or two digits long.
                Something like this (of course you'd then have to
                entirely reindex)<br>
              </span></span></p>
          <p><tt><br>
            </tt><tt>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; # First approximation is if this word is
              over or equal</tt><tt><br>
            </tt><tt>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; # to the minimum size set in SiteInfo.</tt><tt><br>
            </tt><tt>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; my $ok = $wordlen &gt;=
              $c-&gt;{indexing}-&gt;{freetext_min_word_size};</tt><tt><br>
            </tt></p>
          <p><tt><font color="#ff0000">&nbsp; &nbsp;&nbsp;&nbsp; &nbsp; if( $word =~ m/^\d&#43;$/ ) {<br>
                &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; $ok = 1;<br>
                &nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; </font></tt><br>
          </p>
          <div class="moz-cite-prefix">On 30/04/2020 08:27, Yuri via
            Eprints-tech wrote:<br>
          </div>
          <blockquote type="cite" cite="mid:EMEW3|b966302d0df9e000a031a1f8b6e8872cw3Y8YW14eprints-tech-bounces|ecs.soton.ac.uk|d32bf79e-5ac1-3c16-f6d0-c890b0b95c0d@alfa.it">
            <p>Hi!</p>
            <p>&nbsp;I've found that the virus can be referred also as &quot;SARS
              COV-2&quot; so maybe you can add also this. But beware that
              Eprints search has a problem with -, it split the word
              using it.<br>
            </p>
            <div class="moz-cite-prefix">Il 27/04/20 17:06, James Kerwin
              via Eprints-tech ha scritto:<br>
            </div>
            <blockquote type="cite" cite="mid:EMEW3|942a457e724595d3b487147e73b60d14w3QG9014eprints-tech-bounces|ecs.soton.ac.uk|CAKkNZ9Bp5Hpsxb-G9oKRtnn6-pHfcG10ob8mfYBkQ-KFcAF6Sw@mail.gmail.com">
              <div dir="ltr">Hello All,<br>
                <div><br>
                </div>
                <div>I hope everyone is well in body and mind.</div>
                <div><br>
                </div>
                <div>I need some help with the EPrints search function.
                  I have been asked to add a box to the repository
                  homepage that lists the latest coronavirus-related
                  deposits.</div>
                <div><br>
                </div>
                <div>I'm hoping to search via keywords for &quot;coronavirus&quot;
                  and &quot;covid-19&quot;. I also want to search for either of
                  these terms in titles. To do this I'm currently
                  butchering&nbsp;a copy of cgi/latest_tool.</div>
                <div><br>
                </div>
                <div>I can get the keywords part to work using:</div>
                <div><br>
                </div>
                <blockquote style="margin:0 0 0
                  40px;border:none;padding:0px">
                  <blockquote style="margin:0 0 0
                    40px;border:none;padding:0px">
                    <blockquote style="margin:0 0 0
                      40px;border:none;padding:0px">
                      <div>$c-&gt;{latest_rona_modes} = {</div>
                    </blockquote>
                  </blockquote>
                  <blockquote style="margin:0 0 0
                    40px;border:none;padding:0px">
                    <blockquote style="margin:0 0 0
                      40px;border:none;padding:0px">
                      <div> default =&gt; { citation =&gt; &quot;noauth&quot; },</div>
                    </blockquote>
                  </blockquote>
                  <blockquote style="margin:0 0 0
                    40px;border:none;padding:0px">
                    <blockquote style="margin:0 0 0
                      40px;border:none;padding:0px">
                      <div> fplatest =&gt; { </div>
                    </blockquote>
                  </blockquote>
                  <blockquote style="margin:0 0 0
                    40px;border:none;padding:0px">
                    <blockquote style="margin:0 0 0
                      40px;border:none;padding:0px">
                      <div> citation =&gt; &quot;popular&quot;, max =&gt; 5, </div>
                    </blockquote>
                  </blockquote>
                  <blockquote style="margin:0 0 0
                    40px;border:none;padding:0px">
                    <blockquote style="margin:0 0 0
                      40px;border:none;padding:0px">
                      <div> #citation =&gt; &quot;result&quot;, max =&gt; 3, </div>
                    </blockquote>
                  </blockquote>
                  <blockquote style="margin:0 0 0
                    40px;border:none;padding:0px">
                    <blockquote style="margin:0 0 0
                      40px;border:none;padding:0px">
                      <div> filters =&gt; [</div>
                    </blockquote>
                  </blockquote>
                  <blockquote style="margin:0 0 0
                    40px;border:none;padding:0px">
                    <blockquote style="margin:0 0 0
                      40px;border:none;padding:0px">
                      <div> #{ meta_fields =&gt; [
                        &quot;full_text_status&quot;,&quot;full_text_status&quot; ], value
                        =&gt; (&quot;none&quot;||&quot;public&quot;) }</div>
                    </blockquote>
                  </blockquote>
                  <blockquote style="margin:0 0 0
                    40px;border:none;padding:0px">
                    <blockquote style="margin:0 0 0
                      40px;border:none;padding:0px">
                      <div> { meta_fields =&gt; [ &quot;keywords&quot; ], value
                        =&gt; &quot;covid-19&quot;}</div>
                      <div><br>
                      </div>
                    </blockquote>
                  </blockquote>
                </blockquote>
                This also works with &quot;title&quot; as you would expect.
                <div><br>
                </div>
                <div>What I really want is to do a search where the
                  keywords can be &quot;covid-19&quot; OR &quot;coronavirus&quot; as well as
                  including some allowance for adding an:</div>
                <div><br>
                </div>
                <div>&nbsp;&quot;OR title LIKE '%covid-19%' OR title LIKE
                  'coronavirus' in MYSQL-speak.</div>
                <div><br>
                </div>
                <div>Am I able to do this using the&nbsp;EPrints::Search
                  plugin? I've tried reading the codumentation and
                  experimenting with it, but I'm not getting very far.</div>
                <div><br>
                </div>
                <div>If it's not possible I can think of a number of
                  bodges for it, but decided it was best to attempt the
                  proper way first.</div>
                <div><br>
                </div>
                <div>Thanks,</div>
                <div>James</div>
              </div>
              <br>
              <fieldset class="mimeAttachmentHeader"></fieldset>
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          <pre class="moz-signature" cols="72">-- 
Christopher Gutteridge <a class="moz-txt-link-rfc2396E" href="mailto:totl@soton.ac.uk" moz-do-not-send="true">&lt;totl@soton.ac.uk&gt;</a> 
You should read our team blog at <a class="moz-txt-link-freetext" href="http://blog.soton.ac.uk/webteam/" moz-do-not-send="true">http://blog.soton.ac.uk/webteam/</a></pre>
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      <pre class="moz-signature" cols="72">-- 
Christopher Gutteridge <a class="moz-txt-link-rfc2396E" href="mailto:totl@soton.ac.uk" moz-do-not-send="true">&lt;totl@soton.ac.uk&gt;</a> 
You should read our team blog at <a class="moz-txt-link-freetext" href="http://blog.soton.ac.uk/webteam/" moz-do-not-send="true">http://blog.soton.ac.uk/webteam/</a></pre>
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