@openstreetmap/id-tagging-schema/data/fields/destination/symbol_oneway.json

The OpenStreetMap tagging model used by the iD editor

{
    "key": "destination:symbol",
    "type": "semiCombo",
    "label": "{destination/symbol}",
    "prerequisiteTag": {
        "key": "oneway",
        "value": "yes"
    }
}