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    <div class="moz-cite-prefix">On 23/05/2015 9:56 AM, Bryce Nesbitt
      wrote:<br>
    </div>
    <blockquote
cite="mid:CAC9LFPetj0T7G0bu8U+WZ5Do3UHN+kDrM3HkymQqavx4ZJDA4Q@mail.gmail.com"
      type="cite">
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        <div>Duck tagging it's not.  One could consider the horrors of
          tagging:</div>
        <br>
        <blockquote style="margin:0px 0px 0px
          40px;border:none;padding:0px"><b>amenity=charging_station<br>
            voltage=5<br>
            socket:usb=4</b></blockquote>
        <br>
        From <a moz-do-not-send="true"
          href="http://wiki.openstreetmap.org/wiki/Tag:amenity%3Dcharging_station">http://wiki.openstreetmap.org/wiki/Tag:amenity%3Dcharging_station</a>
        <div>But I think that's just as bad an idea as
          amenity=fuel;vehicle=no.</div>
        <div><br>
        </div>
        <div>----------------------------------------------------------------------------------------------------</div>
        <div><br>
        </div>
        <div>Better:</div>
        <div><br>
        </div>
        <blockquote style="margin:0px 0px 0px
          40px;border:none;padding:0px">
          <div><b>amenity=device_charging_station</b></div>
          <div><b><span
style="color:rgb(0,0,0);font-family:sans-serif;font-size:13.3000001907349px;line-height:21.2800006866455px;background-color:rgb(249,249,249)">socket:nema_5_15=2</span><br>
            </b></div>
          <div><b>socket:USB=4</b><br>
          </div>
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        <div><br>
        </div>
        <div>I don't care that amenity is "overloaded".  This is an
          amenity.</div>
        <div><br>
        </div>
        <div><br>
        </div>
        <div><br>
        </div>
        <div>And even better:</div>
        <div><br>
        </div>
        <div><br>
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        <blockquote style="margin:0px 0px 0px
          40px;border:none;padding:0px">
          <div>
            <div><b>amenity=device_charging_station</b></div>
          </div>
          <div>
            <div><span
style="color:rgb(0,0,0);font-family:sans-serif;font-size:13.3000001907349px;line-height:21.2800006866455px;background-color:rgb(249,249,249)"><b>socket:ac=2</b></span></div>
          </div>
          <div>
            <div><b>socket:usb=4 </b>  (there are two types Android and
              Apple, but I gloss over that)</div>
          </div>
          <div><b>socket:apple_30_pin=4</b><br>
          </div>
        </blockquote>
        <div><br>
        </div>
        <div>And someone who cares can invent subtypes for "ac" like
          "sev_1011",</div>
        <div>or worse set something for multi standard sockets: <a
            moz-do-not-send="true"
            href="http://fam-oud.nl/%7Eplugsocket/MultiSockets.html">http://fam-oud.nl/~plugsocket/MultiSockets.html</a></div>
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        <br>
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    </blockquote>
    <br>
    <pre>And there is this ...</pre>
    <pre><a class="moz-txt-link-freetext" href="http://wiki.openstreetmap.org/wiki/Key:power_supply">http://wiki.openstreetmap.org/wiki/Key:power_supply</a></pre>
    <pre>
power_supply=<tt style="background:#DDE;white-space:nowrap" dir="ltr">nema_5_15 for usa...</tt></pre>
    <pre><tt style="background:#DDE;white-space:nowrap" dir="ltr">There is no USB one there (yet) ..usb_typea, usb_typeb etc... ?

it is not a proposal as yet .. but does not identify it self as vehicle related. 
Charging points are avlible in some libraries too .. 

Might be time to move the </tt>tag power_supply= to a proposal. 
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