@openstreetmap/id-tagging-schema/data/presets/amenity/townhall/city.json

The OpenStreetMap tagging model used by the iD editor

{
    "icon": "temaki-capitol",
    "geometry": [
        "point",
        "area"
    ],
    "terms": [
        "council",
        "courthouse",
        "government",
        "mayor",
        "municipality"
    ],
    "fields": [
        "{amenity/townhall}"
    ],
    "moreFields": [
        "{amenity/townhall}"
    ],
    "tags": {
        "amenity": "townhall",
        "townhall:type": "city"
    },
    "reference": {
        "key": "townhall:type",
        "value": "city"
    },
    "name": "City Hall"
}