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    Searching on "110 Laurier Avenue West, on" in Nominatim already
    works (it finds Ottawa City hall) even though the address has no
    addr:province tag for City Halle.  So I don't think this is a good
    reason to be adding addr:province/addr:province:short_name tags.
    IMO.  Unless there is another use case I am missing.  Similarly your
    example of searching for "Toronto, ON" works fine.<br>
    <br>
    I'm guessing this works because the Ontario admin relation has
    ISO3166-2 tag of CA-ON<br>
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    On 2018-03-10 04:51 PM, Pierre Béland wrote:<br>
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      cite="mid:1766206647.21815830.1520718716458@mail.yahoo.com">
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          <div>Non, inutile si relations. Dans relation province
            d'Ontario</div>
          <div>- ajouter short_name='ON'.</div>
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          <div>De cette façon, Recherche Toronto, ON<br>
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          <div>devrait fonctionner. A essayer :)<br>
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          <div class="ydpc1df6996signature"><span
              style="font-style:italic;color:rgb(0, 0,
              191);font-weight:bold;"> <br>
              <font face="garamond, new york, times, serif">Pierre </font><br>
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            <div> Le samedi 10 mars 2018 15:39:53 HNE, john whelan
              <a class="moz-txt-link-rfc2396E" href="mailto:jwhelan0112@gmail.com"><jwhelan0112@gmail.com></a> a écrit : </div>
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                      style="font-family:verdana,
                      sans-serif;font-size:small;">So you're suggesting
                      adding short_name='ON' to ones that have
                      addr:province=Ontario<br clear="none">
                      <br clear="none">
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                      style="font-family:verdana,
                      sans-serif;font-size:small;">How would that work?<br
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                      addr:province=Ontario
                      <br clear="none">
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                      style="font-family:verdana,
                      sans-serif;font-size:small;">addr:province:short_name=ON
                      ?<br clear="none">
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                    <div class="ydpe9cf7ef4yiv8611775199gmail_default"
                      style="font-family:verdana,
                      sans-serif;font-size:small;">Merci John<br
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