{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://schema.roastbook.coffee/common/common.schema.v0.1.0.json",
  "title": "Open Coffee common definitions",
  "description": "Building blocks shared by every Open Coffee dataset (coffee places now; roasters, beans and gear later). Reference them by absolute $id plus a JSON pointer.",
  "$defs": {
    "id": {
      "title": "Identifier",
      "description": "Permanent, opaque identifier. Never reused, never derived from a name, never deleted.",
      "type": "string",
      "pattern": "^[a-z0-9_.-]+$",
      "minLength": 3,
      "maxLength": 64,
      "examples": [
        "cp-7k2m9x4qvd"
      ]
    },
    "date": {
      "title": "Date",
      "description": "Calendar date, YYYY-MM-DD.",
      "type": "string",
      "format": "date"
    },
    "datetime": {
      "title": "Timestamp",
      "description": "RFC 3339 timestamp with time zone, for example 2026-11-05T14:00:00Z.",
      "type": "string",
      "format": "date-time"
    },
    "url": {
      "title": "URL",
      "description": "Absolute http or https URL.",
      "type": "string",
      "format": "uri",
      "pattern": "^https?://"
    },
    "country_code": {
      "title": "Country code",
      "description": "ISO 3166-1 alpha-2 code in upper case.",
      "type": "string",
      "pattern": "^[A-Z]{2}$"
    },
    "currency": {
      "title": "Currency",
      "description": "ISO 4217 currency code.",
      "type": "string",
      "pattern": "^[A-Z]{3}$"
    },
    "address": {
      "title": "Postal address",
      "type": "object",
      "required": [
        "country_code"
      ],
      "additionalProperties": false,
      "properties": {
        "street_address": {
          "type": "string",
          "minLength": 1,
          "description": "Street and house number."
        },
        "postal_code": {
          "type": "string",
          "minLength": 1,
          "description": "Postal code as used locally, for example 80331."
        },
        "locality": {
          "type": "string",
          "minLength": 1,
          "description": "City or town."
        },
        "region": {
          "type": "string",
          "minLength": 1,
          "description": "State or region."
        },
        "country_code": {
          "$ref": "#/$defs/country_code"
        }
      }
    },
    "location": {
      "title": "Coordinates",
      "description": "WGS 84 coordinates of the entrance or building.",
      "type": "object",
      "required": [
        "lat",
        "lon"
      ],
      "additionalProperties": false,
      "properties": {
        "lat": {
          "type": "number",
          "minimum": -90,
          "maximum": 90,
          "description": "Latitude in decimal degrees (WGS 84); positive is north of the equator, for example 48.1371."
        },
        "lon": {
          "type": "number",
          "minimum": -180,
          "maximum": 180,
          "description": "Longitude in decimal degrees (WGS 84); positive is east of Greenwich, for example 11.5754."
        }
      }
    },
    "image": {
      "title": "Image",
      "description": "An openly licensed image. Each image carries its own licence, author and source.",
      "type": "object",
      "required": [
        "url",
        "licence",
        "author",
        "source_url"
      ],
      "additionalProperties": false,
      "properties": {
        "url": {
          "$ref": "#/$defs/url",
          "description": "Where the file is served from (our assets folder or the original host)."
        },
        "licence": {
          "type": "string",
          "minLength": 2,
          "description": "SPDX identifier, for example CC-BY-4.0, CC-BY-SA-4.0 or CC0-1.0."
        },
        "author": {
          "type": "string",
          "minLength": 1,
          "description": "Name of the photographer or creator, as the licence requires it to be credited."
        },
        "source_url": {
          "$ref": "#/$defs/url",
          "description": "Page describing the original file and its licence."
        },
        "title": {
          "type": "string",
          "description": "Short caption describing what the image shows."
        },
        "width": {
          "type": "integer",
          "minimum": 1,
          "description": "Width of the image file in pixels."
        },
        "height": {
          "type": "integer",
          "minimum": 1,
          "description": "Height of the image file in pixels."
        }
      }
    },
    "external_ref": {
      "title": "External reference",
      "description": "A pointer to a record in another service. Never stores the other service's values.",
      "type": "object",
      "required": [
        "source",
        "id"
      ],
      "additionalProperties": false,
      "properties": {
        "source": {
          "type": "string",
          "pattern": "^[a-z0-9_.-]+$",
          "description": "Short name of the other service, for example tripadvisor or untappd. Lowercase letters, digits, dots, dashes and underscores."
        },
        "id": {
          "type": "string",
          "minLength": 1,
          "description": "The record's identifier in the other service."
        },
        "url": {
          "$ref": "#/$defs/url"
        }
      }
    },
    "dataset_meta": {
      "title": "Dataset metadata",
      "type": "object",
      "required": [
        "licence"
      ],
      "properties": {
        "licence": {
          "const": "MIT",
          "description": "Licence of the file: MIT, with the copyright notice “Roastbook Open Coffee contributors”."
        }
      },
      "description": "File-level facts that are not records. The schema version is the $schema URL; the data version is the release tag."
    }
  }
}