Agree, there no regexes at first. But is it possible to query this tagging scheme? Lets say you have color[1]=purple color[2]=orange color[3]=green
How do you query for green in overpass? In JOSM? And what if for another object you will have different set of tags with different order? color[1]=black color[2]=green color[3]=white Thats why I was always suggesting this approach: color:*<actualcolorvalue>*=yes This is not array, but set. There semantic in key part of key=value. I.e. this is very similar to what OSM was always doing, no need for numeric indexes in keys IMO. It was mentioned in this discussion already.
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