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

The OpenStreetMap tagging model used by the iD editor

{
    "key": "direction",
    "type": "combo",
    "label": "{direction_vertex}",
    "stringsCrossReference": "{direction_vertex}",
    "options": [
        "forward",
        "backward"
    ],
    "geometry": [
        "vertex"
    ],
    "autoSuggestions": false,
    "customValues": false
}