@openstreetmap/id-tagging-schema/data/fields/level_semi.json

The OpenStreetMap tagging model used by the iD editor

{
    "key": "level",
    "type": "semiCombo",
    "label": "Levels",
    "terms": [
        "building floors",
        "decks",
        "stories",
        "storeys",
        "storys"
    ]
}