{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://api-evangelist.github.io/discgolfapi/json-schema/discgolfapi-course-schema.json",
  "title": "DiscGolfAPI Course",
  "description": "JSON Schema for a public disc golf course record as published by DiscGolfAPI. Captures stable identity, location, operational and access status, confidence and verification signals, and the primary playing layout.",
  "type": "object",
  "required": [
    "id",
    "slug",
    "name",
    "lat",
    "lon",
    "country_code",
    "region_code",
    "locality",
    "website",
    "operator_name",
    "holes",
    "existence_status",
    "operational_status",
    "access_model",
    "condition_status",
    "listing_status",
    "confidence_score",
    "verification_strength",
    "last_verified_at",
    "updated_at",
    "primary_layout",
    "attributes"
  ],
  "properties": {
    "id": {
      "type": "string",
      "pattern": "^crs_[a-z0-9_]+$",
      "description": "Stable public course identifier."
    },
    "slug": {
      "type": "string",
      "description": "URL-safe slug for the course."
    },
    "name": {
      "type": "string",
      "description": "Display name of the course."
    },
    "lat": {
      "type": ["number", "null"],
      "minimum": -90,
      "maximum": 90,
      "description": "Latitude in decimal degrees. Null when coordinates are not available."
    },
    "lon": {
      "type": ["number", "null"],
      "minimum": -180,
      "maximum": 180,
      "description": "Longitude in decimal degrees. Null when coordinates are not available."
    },
    "country_code": {
      "type": "string",
      "minLength": 2,
      "maxLength": 2,
      "description": "ISO 3166-1 alpha-2 country code."
    },
    "region_code": {
      "type": ["string", "null"],
      "description": "Region, state, or subdivision code where available."
    },
    "locality": {
      "type": ["string", "null"],
      "description": "City, town, or locality name where available."
    },
    "website": {
      "type": ["string", "null"],
      "format": "uri",
      "description": "Official course or operator website where available."
    },
    "operator_name": {
      "type": ["string", "null"],
      "description": "Operating organisation or club name where available."
    },
    "holes": {
      "type": ["integer", "null"],
      "minimum": 1,
      "description": "Known hole count. Null means unknown, not zero."
    },
    "existence_status": {
      "type": "string",
      "description": "Whether the course is believed to exist (e.g., existing, removed, proposed)."
    },
    "operational_status": {
      "type": "string",
      "description": "Whether the course is currently playable (e.g., open, closed, seasonal)."
    },
    "access_model": {
      "type": "string",
      "description": "Access model such as public, private, pay-to-play, or unknown."
    },
    "condition_status": {
      "type": "string",
      "description": "Reported condition of the course (e.g., maintained, neglected, unknown)."
    },
    "listing_status": {
      "type": "string",
      "description": "Public listing status (e.g., listed, unlisted)."
    },
    "confidence_score": {
      "type": "number",
      "minimum": 0,
      "maximum": 1,
      "description": "Numeric confidence signal for the record between 0 and 1."
    },
    "verification_strength": {
      "type": "string",
      "description": "Human-readable verification bucket such as low, medium, or high."
    },
    "last_verified_at": {
      "type": ["string", "null"],
      "format": "date-time",
      "description": "Timestamp of the most recent verification, when available."
    },
    "updated_at": {
      "type": "string",
      "format": "date-time",
      "description": "Timestamp of the most recent record update."
    },
    "primary_layout": {
      "oneOf": [
        { "$ref": "#/$defs/PrimaryLayout" },
        { "type": "null" }
      ],
      "description": "Primary playing layout for the course where defined."
    },
    "attributes": {
      "type": ["object", "null"],
      "additionalProperties": true,
      "description": "Open extension bag for forward-compatible course attributes."
    }
  },
  "$defs": {
    "PrimaryLayout": {
      "type": "object",
      "required": [
        "id",
        "slug",
        "name",
        "holes",
        "par_total",
        "length_meters",
        "confidence_score",
        "verification_strength",
        "last_verified_at"
      ],
      "properties": {
        "id": { "type": "string", "description": "Stable layout identifier." },
        "slug": { "type": "string", "description": "URL-safe slug for the layout." },
        "name": { "type": "string", "description": "Display name of the layout." },
        "holes": { "type": ["integer", "null"], "minimum": 1, "description": "Hole count of the layout." },
        "par_total": { "type": ["integer", "null"], "minimum": 1, "description": "Total par for the layout." },
        "length_meters": { "type": ["number", "null"], "minimum": 0, "description": "Total layout length in meters." },
        "confidence_score": { "type": "number", "minimum": 0, "maximum": 1, "description": "Confidence signal for the layout." },
        "verification_strength": { "type": "string", "description": "Verification bucket for the layout." },
        "last_verified_at": { "type": ["string", "null"], "format": "date-time", "description": "Layout verification timestamp." }
      }
    }
  }
}