@openstreetmap/id-tagging-schema/data/fields/bridge/ref.json

The OpenStreetMap tagging model used by the iD editor

{
    "key": "bridge:ref",
    "type": "text",
    "label": "Bridge Number",
    "reference": {
        "key": "bridge"
    },
    "prerequisiteTag": {
        "key": "bridge",
        "valueNot": "no"
    }
}