{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://schema.roastbook.coffee/equipment/equipment.schema.v0.4.0.json",
  "title": "Open Coffee equipment catalog",
  "description": "Coffee equipment models (machines, grinders, brewers, kettles, scales and accessories) as sold, not individual owned items. Measurements put the unit in the property name. Part of Roastbook Open Coffee; derived from the Roastbook journal gear model.",
  "type": "object",
  "required": [
    "$schema",
    "meta",
    "equipment"
  ],
  "additionalProperties": false,
  "properties": {
    "$schema": {
      "type": "string",
      "pattern": "^https://schema\\.roastbook\\.coffee/equipment/equipment\\.schema\\.v[0-9]+\\.[0-9]+\\.[0-9]+\\.json$",
      "description": "Canonical URL of the schema version this file follows."
    },
    "meta": {
      "type": "object",
      "$ref": "https://schema.roastbook.coffee/common/common.schema.v0.4.0.json#/$defs/dataset_meta",
      "unevaluatedProperties": false
    },
    "equipment": {
      "type": "array",
      "items": {
        "$ref": "#/$defs/item"
      }
    }
  },
  "$defs": {
    "type": {
      "title": "Equipment type",
      "enum": [
        "espresso_machine",
        "espresso_machine_with_grinder",
        "grinder",
        "brewer",
        "kettle",
        "scale",
        "tamper",
        "wdt",
        "basket",
        "filter",
        "roaster",
        "milk_frother",
        "accessory"
      ],
      "description": "espresso_machine_with_grinder is an espresso machine with a built-in grinder; filter covers paper and metal filters; accessory covers everything without a dedicated type (puck screens, distribution tools, thermometers, dosing cups)."
    },
    "espresso_machine": {
      "title": "Espresso machine details",
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "heating_architecture": {
          "enum": [
            "single_boiler",
            "heat_exchanger",
            "dual_boiler",
            "multi_boiler",
            "single_thermoblock",
            "dual_thermoblock",
            "hybrid",
            "manual",
            "other"
          ],
          "description": "How the machine heats water. single_boiler: one boiler for brewing and steam, used in turn; heat_exchanger: one steam boiler that heats brew water passing through a pipe inside it; dual_boiler: separate brew and steam boilers; multi_boiler: more than two boilers, for example one per group; single_thermoblock and dual_thermoblock: water heated on the fly in one or two thermoblocks; hybrid: a boiler combined with a thermoblock; manual: no heater, you pour in hot water."
        },
        "temperature_control": {
          "enum": [
            "none",
            "fixed",
            "adjustable",
            "programmable"
          ],
          "description": "How brew temperature is set. none: no control; fixed: set at the factory; adjustable: the user can change it (for example with a PID); programmable: can change during the shot or follow profiles."
        },
        "pressure_control": {
          "enum": [
            "fixed",
            "adjustable_opv",
            "manual",
            "programmable"
          ],
          "description": "How brew pressure is set. fixed: set by the factory; adjustable_opv: the over-pressure valve can be adjusted; manual: controlled by hand, for example with a lever; programmable: follows set pressure profiles."
        },
        "flow_control": {
          "enum": [
            "none",
            "manual",
            "programmable"
          ],
          "description": "Whether water flow during the shot can be controlled. none: no control; manual: by hand, for example a needle valve paddle; programmable: follows set profiles."
        },
        "preinfusion_control": {
          "enum": [
            "none",
            "supported",
            "fixed",
            "adjustable",
            "programmable"
          ],
          "description": "Wetting the coffee at low pressure before full pressure. none: no preinfusion; supported: possible by hand or by technique; fixed: built in with a fixed duration; adjustable: duration or pressure can be set; programmable: part of a programmable profile."
        },
        "steam_system": {
          "enum": [
            "none",
            "shared_heater",
            "dedicated_heater"
          ],
          "description": "How milk steam is produced. none: no steam wand; shared_heater: the same heater as for brewing, so the machine switches between modes; dedicated_heater: a separate boiler or thermoblock for steam."
        },
        "simultaneous_brew_and_steam": {
          "type": "boolean",
          "description": "Whether you can pull a shot and steam milk at the same time. true: possible; false: confirmed not possible; absent: unknown."
        },
        "pump_type": {
          "enum": [
            "vibration",
            "rotary",
            "gear",
            "peristaltic",
            "manual",
            "other"
          ],
          "description": "How pressure is made. vibration: small vibratory pump; rotary: quieter rotary vane pump; gear: gear pump, often used for flow profiling; peristaltic: squeezed-tube pump; manual: lever or hand pump, no motor."
        },
        "water_source_modes": {
          "type": "array",
          "uniqueItems": true,
          "minItems": 1,
          "items": {
            "enum": [
              "reservoir",
              "plumbed"
            ]
          },
          "description": "Where water comes from. reservoir: a tank you fill; plumbed: connected to the mains water supply."
        },
        "shot_stop_modes": {
          "type": "array",
          "uniqueItems": true,
          "items": {
            "enum": [
              "manual",
              "weight",
              "time",
              "volume"
            ]
          },
          "description": "How a shot can be stopped. manual: by the user; weight: automatically at a target weight with a scale; time: after a set time; volume: after a set volume (volumetric dosing)."
        },
        "group_count": {
          "type": "integer",
          "minimum": 1,
          "description": "Number of brew groups (where portafilters lock in), for example 1 for most home machines."
        },
        "portafilter_diameter_mm": {
          "type": "number",
          "exclusiveMinimum": 0,
          "description": "Inner diameter of the portafilter basket in millimetres, for example 58."
        },
        "brew_pressure_min_bar": {
          "type": "number",
          "exclusiveMinimum": 0,
          "description": "Lowest brew pressure the machine can deliver, in bar."
        },
        "brew_pressure_max_bar": {
          "type": "number",
          "exclusiveMinimum": 0,
          "description": "Highest brew pressure the machine can deliver, in bar."
        },
        "brew_temperature_min_celsius": {
          "type": "number",
          "exclusiveMinimum": 0,
          "description": "Lowest brew water temperature that can be set, in degrees Celsius."
        },
        "brew_temperature_max_celsius": {
          "type": "number",
          "exclusiveMinimum": 0,
          "description": "Highest brew water temperature that can be set, in degrees Celsius."
        },
        "reservoir_capacity_ml": {
          "type": "number",
          "exclusiveMinimum": 0,
          "description": "Size of the water tank in millilitres."
        },
        "power_w": {
          "type": "number",
          "exclusiveMinimum": 0,
          "description": "Rated electrical power in watts."
        },
        "group_type": {
          "enum": [
            "e61",
            "saturated",
            "semi_saturated",
            "lever",
            "integrated",
            "other"
          ],
          "description": "Type of brew group. e61: the classic heated E61 group; saturated: group filled with boiler water and kept at its temperature; semi_saturated: group attached to the boiler but not fully filled; lever: piston group driven by a lever; integrated: group built into a thermoblock or the machine body; other: anything else."
        },
        "boiler_count": {
          "type": "integer",
          "minimum": 0,
          "description": "Number of boilers, 0 for thermoblock or manual machines."
        },
        "connectivity": {
          "type": "array",
          "uniqueItems": true,
          "items": {
            "enum": [
              "bluetooth",
              "wifi",
              "usb"
            ]
          },
          "description": "Wireless or wired connections for apps or updates: bluetooth, wifi or usb."
        }
      }
    },
    "grinder": {
      "title": "Grinder details",
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "burr_mechanism": {
          "enum": [
            "conical",
            "flat",
            "ghost",
            "roller",
            "blade",
            "other"
          ],
          "description": "Type of cutting parts. conical: cone-shaped burrs; flat: two flat discs; ghost: flat burrs in a design without a burr carrier contact, sold as \"ghost burrs\"; roller: industrial-style roller mill; blade: spinning blade that chops rather than grinds; other: anything else."
        },
        "burr_diameter_mm": {
          "type": "number",
          "exclusiveMinimum": 0,
          "description": "Diameter of the burrs in millimetres, for example 64 for many flat-burr grinders."
        },
        "burr_material": {
          "enum": [
            "steel",
            "ceramic",
            "titanium_coated",
            "other"
          ],
          "description": "What the burrs are made of. steel: hardened steel; ceramic: ceramic burrs; titanium_coated: steel with a titanium or similar hard coating; other: anything else."
        },
        "adjustment_type": {
          "enum": [
            "fixed",
            "stepped",
            "stepless"
          ],
          "description": "How grind size is changed. fixed: cannot be changed; stepped: clicks between set positions; stepless: any position in between."
        },
        "grind_setting_format": {
          "enum": [
            "whole_number",
            "decimal",
            "string"
          ],
          "description": "How the dial reads, so journals can store settings."
        },
        "grind_setting_min": {
          "type": "number",
          "description": "Lowest number on the grind dial, as printed by the maker."
        },
        "grind_setting_max": {
          "type": "number",
          "description": "Highest number on the grind dial, as printed by the maker."
        },
        "brew_range": {
          "type": "array",
          "uniqueItems": true,
          "minItems": 1,
          "items": {
            "enum": [
              "espresso",
              "filter",
              "turkish"
            ]
          },
          "description": "Brew styles the grinder can grind for, as stated by the maker: espresso, filter or turkish (extra fine)."
        },
        "bean_feed": {
          "enum": [
            "single_dose",
            "hopper",
            "both"
          ],
          "description": "How beans go in. single_dose: weighed dose for each brew; hopper: a container holding beans for many brews; both: works either way."
        },
        "dose_control_modes": {
          "type": "array",
          "uniqueItems": true,
          "items": {
            "enum": [
              "manual",
              "time",
              "weight"
            ]
          },
          "description": "How the amount of ground coffee is controlled. manual: the user stops grinding; time: grinds for a set time; weight: stops at a target weight with a built-in scale."
        },
        "drive": {
          "enum": [
            "manual",
            "electric"
          ],
          "description": "manual: turned by hand; electric: driven by a motor."
        },
        "motor_power_w": {
          "type": "number",
          "exclusiveMinimum": 0,
          "description": "Rated motor power in watts."
        },
        "grind_setting_step": {
          "type": "number",
          "exclusiveMinimum": 0,
          "description": "Smallest step between settings on a stepped dial."
        },
        "microns_per_step": {
          "type": "number",
          "exclusiveMinimum": 0,
          "description": "Burr gap change per setting step, as stated by the maker or measured."
        },
        "retention_g": {
          "type": "number",
          "minimum": 0,
          "description": "Ground coffee left inside the grinder after grinding, in grams, as measured or stated by the maker."
        },
        "rpm_min": {
          "type": "number",
          "exclusiveMinimum": 0,
          "description": "Lowest motor speed in revolutions per minute."
        },
        "rpm_max": {
          "type": "number",
          "exclusiveMinimum": 0,
          "description": "Highest motor speed in revolutions per minute. Equal to rpm_min for fixed-speed grinders."
        }
      }
    },
    "brewer": {
      "title": "Brewer details",
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "mechanism": {
          "enum": [
            "percolation",
            "immersion",
            "hybrid",
            "press",
            "vacuum",
            "boiling",
            "other"
          ],
          "description": "How water and coffee meet; matches brew method categories."
        },
        "capacity_ml": {
          "type": "number",
          "exclusiveMinimum": 0,
          "description": "Largest amount of brewed coffee it holds or makes at once, in millilitres."
        },
        "cup_capacity": {
          "type": "integer",
          "minimum": 1,
          "description": "Nominal number of cups the maker states."
        },
        "material": {
          "type": "array",
          "uniqueItems": true,
          "items": {
            "enum": [
              "ceramic",
              "glass",
              "plastic",
              "stainless_steel",
              "copper",
              "aluminium",
              "porcelain",
              "wood",
              "silicone",
              "other"
            ]
          },
          "description": "What the brewer is made of; list every material sold under this model, such as ceramic and plastic."
        },
        "filter_format": {
          "type": "string",
          "pattern": "^[a-z0-9_-]+$",
          "description": "Filter shape or size, e.g. cone_02, flat_185, chemex_6cup, aeropress_round, metal_mesh."
        },
        "filter_shape": {
          "enum": [
            "cone",
            "flat_bottom",
            "basket",
            "disc",
            "none"
          ],
          "description": "Shape of the filter it uses. cone: pointed cone; flat_bottom: flat base, for example wave filters; basket: basket-shaped paper filter used in drip machines; disc: round disc, as in AeroPress; none: no separate filter."
        },
        "flow_control": {
          "enum": [
            "fixed",
            "manual_valve",
            "programmable"
          ],
          "description": "How fast water drains. fixed: set by the design; manual_valve: a valve or switch you open and close; programmable: controlled by the machine."
        },
        "drive": {
          "enum": [
            "manual",
            "electric",
            "stovetop"
          ],
          "description": "manual: you pour or press by hand; electric: a machine heats and pours the water; stovetop: heated on a hob, such as a moka pot."
        }
      }
    },
    "kettle": {
      "title": "Kettle details",
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "capacity_ml": {
          "type": "number",
          "exclusiveMinimum": 0,
          "description": "Largest amount of water it holds, in millilitres."
        },
        "spout_type": {
          "enum": [
            "gooseneck",
            "standard",
            "other"
          ],
          "description": "gooseneck: thin curved spout for a slow, precise pour; standard: ordinary spout; other: anything else."
        },
        "temperature_control": {
          "enum": [
            "none",
            "fixed",
            "adjustable"
          ],
          "description": "none: just boils; fixed: a few preset temperatures; adjustable: any temperature in a range can be set."
        },
        "temperature_min_celsius": {
          "type": "number",
          "exclusiveMinimum": 0,
          "description": "Lowest temperature that can be set, in degrees Celsius."
        },
        "temperature_max_celsius": {
          "type": "number",
          "exclusiveMinimum": 0,
          "description": "Highest temperature that can be set, in degrees Celsius."
        },
        "supports_temperature_hold": {
          "type": "boolean",
          "description": "Whether the kettle can keep water at the set temperature. true: can hold; false: confirmed cannot hold; absent: unknown."
        },
        "heat_source": {
          "enum": [
            "electric",
            "stovetop",
            "induction_compatible",
            "other"
          ],
          "description": "electric: has its own heating base; stovetop: heated on a hob; induction_compatible: stovetop kettle that also works on induction hobs; other: anything else."
        }
      }
    },
    "scale": {
      "title": "Scale details",
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "resolution_g": {
          "type": "number",
          "exclusiveMinimum": 0,
          "description": "Smallest weight step the display shows, in grams, for example 0.1."
        },
        "capacity_g": {
          "type": "number",
          "exclusiveMinimum": 0,
          "description": "Largest weight the scale can measure, in grams."
        },
        "has_timer": {
          "type": "boolean",
          "description": "Built-in timer. true: has one; false: confirmed none; absent: unknown."
        },
        "supports_auto_tare": {
          "type": "boolean",
          "description": "Sets itself to zero when a cup or brewer is put on. true: supported; false: confirmed not supported; absent: unknown."
        },
        "supports_auto_timer": {
          "type": "boolean",
          "description": "Starts the timer by itself when liquid starts to flow or water is poured. true: supported; false: confirmed not supported; absent: unknown."
        },
        "has_flow_rate_display": {
          "type": "boolean",
          "description": "Shows how fast weight changes, in grams per second. true: shown; false: confirmed not shown; absent: unknown."
        },
        "connectivity": {
          "type": "array",
          "uniqueItems": true,
          "items": {
            "enum": [
              "bluetooth",
              "wifi",
              "usb"
            ]
          },
          "description": "Wireless or wired connections to apps or machines: bluetooth, wifi or usb."
        }
      }
    },
    "tamper": {
      "title": "Tamper details",
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "diameter_mm": {
          "type": "number",
          "exclusiveMinimum": 0,
          "description": "Diameter of the tamper base in millimetres, for example 58."
        },
        "force_control": {
          "enum": [
            "none",
            "fixed",
            "adjustable"
          ],
          "description": "none: the user decides how hard to press; fixed: a spring gives a set force; adjustable: the spring force can be set."
        },
        "base_shape": {
          "enum": [
            "flat",
            "convex",
            "rippled",
            "other"
          ],
          "description": "Shape of the pressing surface. flat; convex: slightly curved outward; rippled: grooved surface; other: anything else."
        },
        "self_leveling": {
          "type": "boolean",
          "description": "Whether the tamper sits on the basket rim so it always presses level. true: self-levelling; false: confirmed not self-levelling; absent: unknown."
        }
      }
    },
    "wdt": {
      "title": "WDT tool details",
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "needle_diameter_mm": {
          "type": "number",
          "exclusiveMinimum": 0,
          "description": "Thickness of each needle in millimetres, for example 0.3."
        },
        "needle_count": {
          "type": "integer",
          "minimum": 1,
          "description": "Number of needles."
        },
        "depth_control": {
          "enum": [
            "none",
            "fixed",
            "adjustable"
          ],
          "description": "Whether you can limit how deep the needles reach. none: no limit; fixed: set depth; adjustable: depth can be set."
        }
      }
    },
    "basket": {
      "title": "Portafilter basket details",
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "kind": {
          "enum": [
            "single",
            "double",
            "triple",
            "other"
          ],
          "description": "single, double or triple: the shot size the basket is made for; other: anything else."
        },
        "diameter_mm": {
          "type": "number",
          "exclusiveMinimum": 0,
          "description": "Diameter of the basket in millimetres, for example 58."
        },
        "nominal_dose_g": {
          "type": "number",
          "exclusiveMinimum": 0,
          "description": "Dose of ground coffee the basket is designed for, in grams."
        },
        "dose_min_g": {
          "type": "number",
          "exclusiveMinimum": 0,
          "description": "Smallest recommended dose in grams."
        },
        "dose_max_g": {
          "type": "number",
          "exclusiveMinimum": 0,
          "description": "Largest recommended dose in grams."
        },
        "pressurized": {
          "type": "boolean",
          "description": "A pressurised basket has a single small exit hole that builds pressure even with a coarse grind. true: pressurised; false: standard unpressurised basket; absent: unknown."
        },
        "precision": {
          "type": "boolean",
          "description": "A precision basket has tightly controlled hole sizes, sold for consistent extraction. true: precision basket; false: ordinary basket; absent: unknown."
        }
      }
    },
    "item": {
      "title": "Equipment model",
      "type": "object",
      "additionalProperties": false,
      "required": [
        "id",
        "name",
        "type",
        "manufacturer",
        "checked_at"
      ],
      "properties": {
        "id": {
          "$ref": "https://schema.roastbook.coffee/common/common.schema.v0.4.0.json#/$defs/id",
          "description": "Stable readable slug of manufacturer and model, e.g. hario-v60-02. Never reused.",
          "examples": [
            "hario-v60-02"
          ]
        },
        "name": {
          "type": "string",
          "minLength": 1,
          "description": "Full display name, e.g. Hario V60 02."
        },
        "manufacturer": {
          "title": "Manufacturer",
          "type": "object",
          "additionalProperties": false,
          "properties": {
            "name": {
              "type": "string",
              "minLength": 1,
              "description": "Brand or company name as printed on the product, for example Hario."
            },
            "manufacturer_id": {
              "$ref": "https://schema.roastbook.coffee/common/common.schema.v0.4.0.json#/$defs/id",
              "description": "Reserved for a future manufacturers dataset."
            },
            "country_code": {
              "$ref": "https://schema.roastbook.coffee/common/common.schema.v0.4.0.json#/$defs/country_code"
            },
            "website": {
              "$ref": "https://schema.roastbook.coffee/common/common.schema.v0.4.0.json#/$defs/url"
            }
          },
          "required": [
            "name"
          ]
        },
        "model": {
          "type": "string",
          "minLength": 1,
          "description": "Model name without the brand, for example V60."
        },
        "variants": {
          "type": "array",
          "description": "Sizes or materials sold under the same model, e.g. 01 and 02, ceramic and plastic.",
          "items": {
            "type": "string",
            "minLength": 1
          }
        },
        "type": {
          "$ref": "#/$defs/type"
        },
        "brew_methods": {
          "type": "array",
          "uniqueItems": true,
          "description": "Brew method ids from the Open Coffee brew methods dataset this equipment is made for.",
          "items": {
            "$ref": "https://schema.roastbook.coffee/common/common.schema.v0.4.0.json#/$defs/id"
          }
        },
        "released_year": {
          "type": "integer",
          "minimum": 1800,
          "maximum": 2100,
          "description": "Year the model first went on sale."
        },
        "discontinued": {
          "type": "boolean",
          "description": "Whether the maker has stopped selling the model. true: discontinued; false: still sold; absent: unknown."
        },
        "links": {
          "title": "Links",
          "type": "object",
          "additionalProperties": false,
          "properties": {
            "product": {
              "$ref": "https://schema.roastbook.coffee/common/common.schema.v0.4.0.json#/$defs/url"
            },
            "manual": {
              "$ref": "https://schema.roastbook.coffee/common/common.schema.v0.4.0.json#/$defs/url"
            }
          }
        },
        "image": {
          "$ref": "https://schema.roastbook.coffee/common/common.schema.v0.4.0.json#/$defs/image"
        },
        "xref": {
          "title": "Identifiers elsewhere",
          "type": "object",
          "additionalProperties": false,
          "properties": {
            "wikidata": {
              "type": "string",
              "pattern": "^Q[1-9][0-9]*$",
              "description": "Wikidata item id of the model or product line, for example Q1234567."
            },
            "gtin": {
              "type": "array",
              "items": {
                "type": "string",
                "pattern": "^[0-9]{8,14}$"
              },
              "description": "Barcode numbers (GTIN, EAN or UPC; 8 to 14 digits) printed on the packaging, one per variant."
            },
            "google_product_category": {
              "type": "integer",
              "minimum": 1,
              "description": "Google Product Taxonomy id (Wikidata P11302)."
            },
            "gs1_gpc_brick": {
              "type": "string",
              "pattern": "^[0-9]{8}$",
              "description": "GS1 Global Product Classification brick code (Wikidata P8957)."
            }
          }
        },
        "espresso_machine": {
          "$ref": "#/$defs/espresso_machine"
        },
        "grinder": {
          "$ref": "#/$defs/grinder"
        },
        "brewer": {
          "$ref": "#/$defs/brewer"
        },
        "kettle": {
          "$ref": "#/$defs/kettle"
        },
        "scale": {
          "$ref": "#/$defs/scale"
        },
        "tamper": {
          "$ref": "#/$defs/tamper"
        },
        "wdt": {
          "$ref": "#/$defs/wdt"
        },
        "basket": {
          "$ref": "#/$defs/basket"
        },
        "checked_at": {
          "$ref": "https://schema.roastbook.coffee/common/common.schema.v0.4.0.json#/$defs/datetime"
        },
        "mpn": {
          "type": "string",
          "minLength": 1,
          "description": "Manufacturer part number."
        },
        "weight_g": {
          "type": "number",
          "exclusiveMinimum": 0,
          "description": "Weight of the product without packaging, in grams."
        },
        "dimensions_mm": {
          "type": "object",
          "additionalProperties": false,
          "properties": {
            "width": {
              "type": "number",
              "exclusiveMinimum": 0,
              "description": "Width in millimetres, seen from the front."
            },
            "depth": {
              "type": "number",
              "exclusiveMinimum": 0,
              "description": "Depth in millimetres, from front to back."
            },
            "height": {
              "type": "number",
              "exclusiveMinimum": 0,
              "description": "Height in millimetres."
            }
          },
          "description": "Outside size of the product in millimetres."
        }
      },
      "dependentSchemas": {
        "espresso_machine": {
          "properties": {
            "type": {
              "enum": [
                "espresso_machine",
                "espresso_machine_with_grinder"
              ]
            }
          }
        },
        "grinder": {
          "properties": {
            "type": {
              "enum": [
                "espresso_machine_with_grinder",
                "grinder"
              ]
            }
          }
        },
        "brewer": {
          "properties": {
            "type": {
              "enum": [
                "brewer"
              ]
            }
          }
        },
        "kettle": {
          "properties": {
            "type": {
              "enum": [
                "kettle"
              ]
            }
          }
        },
        "scale": {
          "properties": {
            "type": {
              "enum": [
                "scale"
              ]
            }
          }
        },
        "tamper": {
          "properties": {
            "type": {
              "enum": [
                "tamper"
              ]
            }
          }
        },
        "wdt": {
          "properties": {
            "type": {
              "enum": [
                "wdt"
              ]
            }
          }
        },
        "basket": {
          "properties": {
            "type": {
              "enum": [
                "basket"
              ]
            }
          }
        }
      },
      "description": "Each details object (espresso_machine, grinder, brewer, …) is only allowed for the types it describes."
    }
  }
}