schema.json

{
    "$schema": "http://json-schema.org/draft-04/schema#",
    "$id": "https://github.com/simonpoole/geocontext",
    "type": "object",
    "additionalProperties": {
        "type": "object",
        "additionalProperties": false,
        "properties": {
            "left-hand-traffic": {
                "description": "true if this is a country with left hand traffic",
                "type": "boolean"
            },
            "speed-limits": {
                "description": "An array of commonly signposted speed limits",
                "type": "array",
                "items": {
                    "type": "integer"
                }
            },
            "languages": {
                "description": "An array of languages spoken in use in the region",
                "type": "array",
                "items": {
                    "type": "string"
                }
            },
            "distance": {
                "description": "In what system distances and speeds are measured",
                "type": "string",
                "enum": [
                    "imperial",
                    "metric"
                ]
            },
            "address-keys": {
                "description": "An array of OSM tag keys used in addresses",
                "type": "array",
                "items": {
                    "type": "string"
                }
            }
        }
    }
}