@openstreetmap/id-tagging-schema/data/fields/aerialway/capacity.json

The OpenStreetMap tagging model used by the iD editor

{
    "key": "aerialway:capacity",
    "type": "number",
    "minValue": 0,
    "label": "Capacity (per hour)",
    "placeholder": "500, 2500, 5000..."
}