<p></p>
<p>Okay, by now real actively used addresses are not supported by OSM because of lack of OLC support: <a href="https://www.addressingtheunaddressed.org/" rel="nofollow">https://www.addressingtheunaddressed.org/</a> uses OLC (full code with 4 digit precision after the +) for slum addressing in India (according to their website they moved from their own Go Code system inspired by Irish geocodes to OLC in the very year this issue was opened). As they use only long form codes, they are extremely easy to implement and don't need any Nominatim support. Short codes is harder to implement but could be deferred especially for this case.</p>
<p>Suggestion for supporting short codes would be using the current location on the map as reference point, and if a specifier is given after it, ignore the short code in Nominatim parsing at first, then go to the short code from the place the user picked.</p>

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