# addressclassificationdescriptionvalue The Address Classification Scheme provides varying levels of classification for addressable objects which are captured and maintained by the Local Authorities and Ordnance Survey. This allows searches to be limited on residential or commercial addresses or be more specific to find all the flats or all fast-food outlets. The varying levels of classification are as follows: * Primary Level Classification R: Residential C: Commercial * Secondary Level Classification RD: Residential Dwelling CH: Hotel/Motel/ Boarding/ Guest House * Tertiary Level Classification RD02: Detached House CH01: Boarding/Guest House/ Bed And Breakfast/Youth Hostel * Quaternary Level CH01YH: Youth Hostel This code list is used in association with the Classification Description attribute which is present within the Built Address, Historic Address, Non-Addressable Object and Pre-Build Address Feature Types in both collections of the OS NGD Address Theme. The code list provides a detailed classification for addresses, for example, Dwelling, College and Care Home. | Label | Definition | | ----------------------------------------------------------------------------------------------------------------------- | ------------------------ | | Abbey | No definition available. | | Activity / Leisure / Sports Centre | No definition available. | | Additional Mail / Packet Addressee | No definition available. | | Adit / Incline / Level | No definition available. | | Advertising Hoarding | No definition available. | | Aeronautical Navigation Beacon / Light | No definition available. | | Agricultural | No definition available. | | Agricultural - Applicable to land in farm ownership and not run as a separate business enterprise | No definition available. | | Agricultural Support Objects | No definition available. | | Aid To Aeronautical Navigation | No definition available. | | Aid To Nautical Navigation | No definition available. | | Aid To Navigation | No definition available. | | Aid To Road Navigation | No definition available. | | Air Force | No definition available. | | Air Force Military Range | No definition available. | | Air Force Military Storage | No definition available. | | Air Force Military Training | No definition available. | | Air Force Site | No definition available. | | Air Freight Terminal | No definition available. | | Air Passenger Terminal | No definition available. | | Air Sea Rescue / Air Ambulance | No definition available. | | Air Transport Infrastructure Services | No definition available. | | Aircraft Works | No definition available. | | Airfield | No definition available. | | Airfield / Airstrip / Airport / Air Transport Infrastructure Facility | No definition available. | | Airport | No definition available. | | Allocated Parking | No definition available. | | Allotment | No definition available. | | Ambulance Station | No definition available. | | Amenity - Open areas not attracting visitors | No definition available. | | Amusement Park | No definition available. | | Amusements | No definition available. | | Ancillary Building | No definition available. | | Animal / Bird / Marine Sanctuary | No definition available. | | Animal Centre | No definition available. | | Animal Quarantining | No definition available. | | Animal Sanctuary | No definition available. | | Animal Services | No definition available. | | Aquatic Attraction | No definition available. | | Aqueduct | No definition available. | | Arboretum | No definition available. | | Archaeological Dig Site | No definition available. | | Arena / Stadium | No definition available. | | Army | No definition available. | | Army Military Range | No definition available. | | Army Military Storage | No definition available. | | Army Military Training | No definition available. | | Army Site | No definition available. | | Art Centre / Gallery | No definition available. | | Assessment / Development Services | No definition available. | | Athletics Facility | No definition available. | | Automated Teller Machine (ATM) | No definition available. | | Aviary / Dovecot / Cage | No definition available. | | Aviation Museum | No definition available. | | Awaiting Classification | No definition available. | | Balancing Pond | No definition available. | | Bandstand | No definition available. | | Bank / Financial Service | No definition available. | | Bar | No definition available. | | Beach Hut (Recreational, Non-Residential Use Only) | No definition available. | | Beach Office / First Aid Facility | No definition available. | | Betting Shop | No definition available. | | Bingo Hall / Cinema / Conference / Exhibition Centre / Theatre / Concert Hall | No definition available. | | Boarding / Guest House / Bed And Breakfast / Youth Hostel | No definition available. | | Boat Building | No definition available. | | Boat Storage | No definition available. | | Boulder Wall / Sea Wall | No definition available. | | Boundary / Significant / Historic Tree / Pollard | No definition available. | | Boundary / Significant Rock / Boulder | No definition available. | | Boundary Stone | No definition available. | | Bowls Facility | No definition available. | | Brewery | No definition available. | | Brick Works | No definition available. | | Broadcasting (TV / Radio) | No definition available. | | Builders' Yard | No definition available. | | Burial Ground | No definition available. | | Buried Reservoir | No definition available. | | Bus / Coach Depot | No definition available. | | Bus / Coach Station | No definition available. | | Bus Shelter | No definition available. | | Butt / Hide | No definition available. | | CCTV | No definition available. | | Cable Terminal Station | No definition available. | | Caisson / Dry Dock / Grid | No definition available. | | Camping | No definition available. | | Car / Coach / Commercial Vehicle / Taxi Parking / Park And Ride Site | No definition available. | | Car Park Space | No definition available. | | Caravan | No definition available. | | Caravanning | No definition available. | | Care / Nursing Home | No definition available. | | Cascade / Fountain | No definition available. | | Castle / Historic Ruin | No definition available. | | Cathedral | No definition available. | | Cattery / Kennel | No definition available. | | Cattle Grid / Ford | No definition available. | | Cave | No definition available. | | Cellar | No definition available. | | Cement Works | No definition available. | | Cemetery | No definition available. | | Cemetery / Crematorium / Graveyard. In Current Use. | No definition available. | | Central Government Service | No definition available. | | Chair Lift / Cable Car / Ski Tow | No definition available. | | Channel / Conveyor / Conduit / Pipe | No definition available. | | Chapel | No definition available. | | Chapel Of Rest | No definition available. | | Chemical Works | No definition available. | | Children's Nursery / Creche | No definition available. | | Chimney / Flue | No definition available. | | Church | No definition available. | | Church Hall / Religious Meeting Place / Hall | No definition available. | | Cider Manufacture | No definition available. | | Cinema | No definition available. | | Civilian Firing Facility | No definition available. | | Cliff Railway | No definition available. | | Coastal Protection / Flood Prevention | No definition available. | | Coastguard Rescue / Lookout / Station | No definition available. | | College | No definition available. | | Columbarium | No definition available. | | Commercial | No definition available. | | Commercial Construction Site | No definition available. | | Commercial Stabling / Riding | No definition available. | | Communal Residence | No definition available. | | Community Construction Site | No definition available. | | Community Service Centre / Office | No definition available. | | Community Services | No definition available. | | Conference / Exhibition Centre | No definition available. | | Container Freight | No definition available. | | Convenience Store | No definition available. | | Cooling Tower | No definition available. | | Crane / Hoist / Winch / Material Elevator | No definition available. | | Crematorium | No definition available. | | Cricket Facility | No definition available. | | Crop Handling / Storage | No definition available. | | Curling Facility | No definition available. | | Currick | No definition available. | | Customs Inspection Facility | No definition available. | | Cycle Parking Facility | No definition available. | | Cycling Sports Facility | No definition available. | | Dairy Processing | No definition available. | | Dam | No definition available. | | Daymark | No definition available. | | Decoy Pond | No definition available. | | Defence Estates | No definition available. | | Dentist | No definition available. | | Detached | No definition available. | | Development | No definition available. | | Development Site | No definition available. | | Dew Pond | No definition available. | | Distillery | No definition available. | | Disused Mine | No definition available. | | Diving / Swimming Facility | No definition available. | | Drain | No definition available. | | Dual Use | No definition available. | | Dwelling | No definition available. | | Education | No definition available. | | Electric Car Charging Station | No definition available. | | Electricity Distribution Facility | No definition available. | | Electricity Distribution Pole / Pylon | No definition available. | | Electricity Production Facility | No definition available. | | Electricity Sub-Station | No definition available. | | Elevator / Escalator / Steps | No definition available. | | Embassy / High Commission / Consulate | No definition available. | | Emergency / Rescue Service | No definition available. | | Emergency Equipment Point / Emergency Siren / Warning Flag | No definition available. | | Emergency Support | No definition available. | | Emergency Telephone (Non Motorway) | No definition available. | | Entertainment Complex | No definition available. | | Equestrian | No definition available. | | Equestrian Sports Facility | No definition available. | | Factory/Manufacturing | No definition available. | | Farm / Non-Residential Associated Building | No definition available. | | Fast Food Outlet / Takeaway (Hot / Cold) | No definition available. | | Film Studio | No definition available. | | Fire Alarm Structure / Fire Observation Tower / Fire Beater Facility | No definition available. | | Fire Service Training | No definition available. | | Fire Station | No definition available. | | First School | No definition available. | | Fish Farming | No definition available. | | Fish Hatchery | No definition available. | | Fish Ladder / Lock / Pen / Trap | No definition available. | | Fish Market | No definition available. | | Fish Processing | No definition available. | | Fishery | No definition available. | | Fishing / Angling Facility | No definition available. | | Flare Stack | No definition available. | | Flood Gate / Flood Sluice Gate / Flood Valve | No definition available. | | Flour Mill | No definition available. | | Fog Horn Warning | No definition available. | | Food Processing | No definition available. | | Football Facility | No definition available. | | Footbridge / Walkway | No definition available. | | Forest / Arboretum / Pinetum (Managed / Unmanaged) | No definition available. | | Forestry | No definition available. | | Fruit / Vegetable Market | No definition available. | | Further Education | No definition available. | | Gallop / Ride | No definition available. | | Garage | No definition available. | | Garden Centre | No definition available. | | Gas / Oil Storage / Distribution | No definition available. | | Gas Governor | No definition available. | | Gas Holder | No definition available. | | General Practice Surgery / Clinic | No definition available. | | General Storage Land | No definition available. | | Glassworks | No definition available. | | Gliding Facility | No definition available. | | Golf Facility | No definition available. | | Goods Freight Handling / Terminal | No definition available. | | Goods Tramway | No definition available. | | Grab / Skip / Other Industrial Waste Machinery / Discharging | No definition available. | | Grazing Land | No definition available. | | Greyhound Racing Facility | No definition available. | | Groyne | No definition available. | | Guide Post | No definition available. | | Gurdwara | No definition available. | | HM Detention Centre | No definition available. | | HM Prison Service | No definition available. | | HMO Bedsit / Other Non Self Contained Accommodation | No definition available. | | HMO Not Further Divided | No definition available. | | HMO Parent | No definition available. | | Harbour / Port / Dock / Dockyard / Slipway / Landing Stage / Pier / Jetty / Pontoon / Terminal / Berthing / Quay | No definition available. | | Health Care Services | No definition available. | | Health Centre | No definition available. | | Heath / Moorland | No definition available. | | Helicopter Station | No definition available. | | Heliport / Helipad | No definition available. | | Heritage Centre | No definition available. | | Higher Education | No definition available. | | Historic / Disused Cemetery / Graveyard | No definition available. | | Historic Structure / Object | No definition available. | | Historic Vessel / Aircraft / Vehicle | No definition available. | | Historical Site / Object | No definition available. | | Hockey Facility | No definition available. | | Holiday / Campsite | No definition available. | | Holiday Accommodation | No definition available. | | Holiday Centre | No definition available. | | Holiday Let/Accomodation/Short-Term Let Other Than CH01 | No definition available. | | Hopper / Silo / Cistern / Tank | No definition available. | | Horse Racing / Breeding Stable | No definition available. | | Horse Racing Facility | No definition available. | | Horticulture | No definition available. | | Hospice | No definition available. | | Hospital | No definition available. | | Hospital / Hospice | No definition available. | | Hotel / Motel / Boarding / Guest House | No definition available. | | Hotel/Motel | No definition available. | | House Boat | No definition available. | | House In Multiple Occupation | No definition available. | | Incinerator / Waste Transfer Station | No definition available. | | Indoor / Outdoor Leisure / Sporting Activity / Centre | No definition available. | | Industrial Applicable to manufacturing, engineering, maintenance, storage / wholesale distribution and extraction sites | No definition available. | | Industrial Museum | No definition available. | | Industrial Overflow / Sluice / Valve / Valve Housing | No definition available. | | Industrial Support | No definition available. | | Infant School | No definition available. | | Information | No definition available. | | Job Centre | No definition available. | | Junior School | No definition available. | | Kiln / Oven / Smelter | No definition available. | | Kingdom Hall | No definition available. | | LIfe / Belt / Buoy / Float / Jacket / Safety Rope | No definition available. | | Lake / Reservoir | No definition available. | | Land | No definition available. | | Landfill | No definition available. | | Landing Light | No definition available. | | Landscaped Roundabout | No definition available. | | Law Court | No definition available. | | Lay-By | No definition available. | | Leats / Races | No definition available. | | Leisure - Applicable to recreational sites and enterprises | No definition available. | | Leisure Pier | No definition available. | | Level Crossing | No definition available. | | Library | No definition available. | | Licensed Private Members' Club | No definition available. | | Lifeboat Services / Station | No definition available. | | Lifeguard Facility | No definition available. | | Lighthouse | No definition available. | | Livestock Market | No definition available. | | Livestock Pen / Dip | No definition available. | | Local Government Service | No definition available. | | Lock | No definition available. | | Lock-Up Garage / Garage Court | No definition available. | | Lych Gate | No definition available. | | Made Central Reservation | No definition available. | | Mail Pick Up | No definition available. | | Maintained Amenity Land | No definition available. | | Maintained Surfaced Area | No definition available. | | Maintenance Depot | No definition available. | | Manhole / Shaft | No definition available. | | Manufacturing | No definition available. | | Marina | No definition available. | | Marine Sanctuary | No definition available. | | Maritime Museum | No definition available. | | Market (Indoor / Outdoor) | No definition available. | | Mausoleum / Tomb / Grave | No definition available. | | Maze | No definition available. | | Medical | No definition available. | | Medical / Testing / Research Laboratory | No definition available. | | Memorial / Market Cross | No definition available. | | Meteorological Station / Equipment | No definition available. | | Middle School | No definition available. | | Military | No definition available. | | Military Cemetery | No definition available. | | Military Museum | No definition available. | | Military Target | No definition available. | | Mineral / Ore Working / Quarry / Mine | No definition available. | | Mineral Distribution / Storage | No definition available. | | Mineral Mining / Active | No definition available. | | Mineral Mining / Inactive | No definition available. | | Mineral Processing | No definition available. | | Mineral Quarrying / Open Extraction / Active | No definition available. | | Mineral Quarrying And / Open Extraction / Inactive | No definition available. | | Miniature Railway | No definition available. | | Minster | No definition available. | | Model Sports Facility | No definition available. | | Model Village Site | No definition available. | | Monorail | No definition available. | | Monument | No definition available. | | Mooring | No definition available. | | Mortuary | No definition available. | | Mosque | No definition available. | | Motor Sports Facility | No definition available. | | Mountain Rescue Station | No definition available. | | Museum / Gallery | No definition available. | | Named Pond | No definition available. | | Natural Central Reservation | No definition available. | | Natural Hole (Blow / Shake / Swallow) | No definition available. | | Natural Verge | No definition available. | | Nautical Navigation Beacon / Light | No definition available. | | Nautical Refuelling Facility | No definition available. | | Naval Military Range | No definition available. | | Naval Military Storage | No definition available. | | Naval Military Training | No definition available. | | Naval Site | No definition available. | | Navy | No definition available. | | Nightclub | No definition available. | | Non State Primary / Preparatory School | No definition available. | | Non State Secondary School | No definition available. | | Non-Commercial Lodgings | No definition available. | | Non-Tanker Nautical Berthing | No definition available. | | Oast House | No definition available. | | Obelisk | No definition available. | | Obelisk / Milestone / Standing Stone | No definition available. | | Object of Interest | No definition available. | | Observatory | No definition available. | | Off-licence | No definition available. | | Office | No definition available. | | Office / Work Studio | No definition available. | | Oil / Gas Extraction / Active | No definition available. | | Oil And / Gas Extraction/ Inactive | No definition available. | | Oil Refining | No definition available. | | Oil Terminal | No definition available. | | Open Space | No definition available. | | Orchard | No definition available. | | Ornamental / Cultural Object | No definition available. | | Other (Ordnance Survey Only) | No definition available. | | Other Educational Establishment | No definition available. | | Other Licensed Premise / Vendor | No definition available. | | Other Public Telephones | No definition available. | | Other Structure | No definition available. | | Other Underground Feature | No definition available. | | Other Utility Use | No definition available. | | Overnight Lorry Park | No definition available. | | Oyster / Mussel Bed | No definition available. | | PO Box | No definition available. | | Paddling Pool | No definition available. | | Paper Mill | No definition available. | | Parent Shell | No definition available. | | Park | No definition available. | | Passenger Ferry Terminal | No definition available. | | Pavement | No definition available. | | Pavilion / Changing Room | No definition available. | | Pending Internal Investigation | No definition available. | | Permanent Art Display / Sculpture | No definition available. | | Permanent Crop / Crop Rotation | No definition available. | | Petrol Filling Station | No definition available. | | Pharmacy | No definition available. | | Picnic / Barbeque Site | No definition available. | | Place Of Worship | No definition available. | | Play Area | No definition available. | | Playground | No definition available. | | Playing Field | No definition available. | | Pole / Post / Bollard (Restricting Vehicular Access) | No definition available. | | Police / Transport Police / Station | No definition available. | | Police Box / Kiosk | No definition available. | | Police Training | No definition available. | | Post Office | No definition available. | | Postal Box | No definition available. | | Postal Delivery Box / Pouch | No definition available. | | Postal Sorting / Distribution | No definition available. | | Pothole / Natural Hole | No definition available. | | Pottery Manufacturing | No definition available. | | Power Station / Energy Production | No definition available. | | Preparatory / First / Primary / Infant / Junior / Middle School | No definition available. | | Primary School | No definition available. | | Printing Works | No definition available. | | Prison | No definition available. | | Private Park / Garden | No definition available. | | Privately Owned Holiday Caravan / Chalet | No definition available. | | Professional Medical Service | No definition available. | | Property Shell | No definition available. | | Public / Village Hall / Other Community Facility | No definition available. | | Public Car Parking | No definition available. | | Public Coach Parking | No definition available. | | Public Commercial Vehicle Parking | No definition available. | | Public Convenience | No definition available. | | Public House | No definition available. | | Public House / Bar / Nightclub | No definition available. | | Public Household Waste Recycling Centre (HWRC) | No definition available. | | Public Open Space / Nature Reserve | No definition available. | | Public Park / Garden | No definition available. | | Public Park And Ride | No definition available. | | Public Tennis Court | No definition available. | | Pump House / Pumping Station / Water Tower | No definition available. | | Racquet Sports Facility | No definition available. | | Radar / Satellite Infrastructure | No definition available. | | Radar Station | No definition available. | | Rail Drag | No definition available. | | Rail Freight Transport | No definition available. | | Rail Infrastructure Services | No definition available. | | Rail Kilometre Distance Marker | No definition available. | | Rail Mile Distance Marker | No definition available. | | Rail Signalling | No definition available. | | Rail Weighbridge | No definition available. | | Railway Asset | No definition available. | | Railway Buffer | No definition available. | | Railway Lighting | No definition available. | | Railway Pedestrian Crossing | No definition available. | | Railway Station | No definition available. | | Railway Traverse | No definition available. | | Railway Turntable | No definition available. | | Reading Room | No definition available. | | Recreation Ground | No definition available. | | Recreational / Social Club | No definition available. | | Recycling Plant | No definition available. | | Recycling Site | No definition available. | | Religious Community | No definition available. | | Residential | No definition available. | | Residential Construction Site | No definition available. | | Residential Education | No definition available. | | Residential Institution | No definition available. | | Restaurant / Cafeteria | No definition available. | | Retail | No definition available. | | Retail Service Agent | No definition available. | | Rip-Rap | No definition available. | | Road Bridge Over Canal | No definition available. | | Road Bridge Over Multiple | No definition available. | | Road Bridge Over No Network | No definition available. | | Road Bridge Over Path | No definition available. | | Road Bridge Over Railway | No definition available. | | Road Bridge Over Road | No definition available. | | Road Bridge Over Water | No definition available. | | Road Drag | No definition available. | | Road Freight Transport | No definition available. | | Road Infrastructure Services | No definition available. | | Road Kilometre Distance Marker | No definition available. | | Road Mile Distance Marker | No definition available. | | Road Turntable | No definition available. | | Royal Mail Infrastructure | No definition available. | | Rugby Facility | No definition available. | | Satellite Earth Station | No definition available. | | Science Museum | No definition available. | | Scientific / Observation Support | No definition available. | | Secondary / High School | No definition available. | | Secondary School | No definition available. | | Secure Residential Accommodation | No definition available. | | Self Contained Flat (Includes Maisonette / Apartment) | No definition available. | | Semi-Detached | No definition available. | | Servicing Garage | No definition available. | | Shelter (Not Including Bus Shelter) | No definition available. | | Sheltered Accommodation | No definition available. | | Shinty Facility | No definition available. | | Ship Passenger Terminal | No definition available. | | Shipyard | No definition available. | | Shop / Showroom | No definition available. | | Showground | No definition available. | | Signal Square | No definition available. | | Significant Natural Object | No definition available. | | Simple Ornamental Object | No definition available. | | Skateboarding Facility | No definition available. | | Slaughter House / Abattoir | No definition available. | | Slipway | No definition available. | | Slurry Bed / Pit | No definition available. | | Smallholding | No definition available. | | Solar Panel / Waterwheel | No definition available. | | Solid Fuel Distribution | No definition available. | | Solid Fuel Storage | No definition available. | | Special Needs Establishment. | No definition available. | | Sport / Leisure Support | No definition available. | | Sports Viewing Structure | No definition available. | | Spring | No definition available. | | Stadium | No definition available. | | Standing Stone | No definition available. | | Stately Home | No definition available. | | Static Water | No definition available. | | Station / Interchange / Terminal / Halt | No definition available. | | Statue | No definition available. | | Steel Works | No definition available. | | Storage Land | No definition available. | | Street Furniture | No definition available. | | Street Record | No definition available. | | Stupa | No definition available. | | Subway / Underpass | No definition available. | | Sugar Refinery | No definition available. | | Supermarket | No definition available. | | Synagogue | No definition available. | | Tanker Berthing | No definition available. | | Telecommunication | No definition available. | | Telecommunications Mast | No definition available. | | Telephone Box | No definition available. | | Telephone Exchange | No definition available. | | Telephone Pole / Post | No definition available. | | Telescope / Observation Infrastructure / Astronomy | No definition available. | | Temple | | | Tenpin Bowling Facility | No definition available. | | Terraced | No definition available. | | Theatre | No definition available. | | Timber Distribution | No definition available. | | Timber Mill | No definition available. | | Timber Storage | No definition available. | | Tourist Information Signage | No definition available. | | Traffic Information Signage | No definition available. | | Transport | No definition available. | | Transport Construction Site | No definition available. | | Transport Museum | No definition available. | | Transport Related Infrastructure | No definition available. | | Transport Support | No definition available. | | Transport Track / Way | No definition available. | | Travelling Persons Site | No definition available. | | Unclassified | No definition available. | | Underground Feature | No definition available. | | University | No definition available. | | Unsupported Site | No definition available. | | Unused Land | No definition available. | | Utility | No definition available. | | Vacant / Derelict Land | No definition available. | | Vehicle Dip | No definition available. | | Vehicle Storage | No definition available. | | Vehicular Ferry Terminal | No definition available. | | Vehicular Rail Terminal | No definition available. | | Verge / Central Reservation | No definition available. | | Vet / Animal Medical Treatment | No definition available. | | Vineyard | No definition available. | | Visitor Information | No definition available. | | Warehouse / Store / Storage Depot | No definition available. | | Waste Management | No definition available. | | Waste Water Distribution / Pumping | No definition available. | | Waste Water Treatment | No definition available. | | Water | No definition available. | | Water / Waste Water / Sewage Treatment Works | No definition available. | | Water Controlling / Pumping | No definition available. | | Water Distribution / Pumping | No definition available. | | Water Quality Monitoring | No definition available. | | Water Sports Facility | No definition available. | | Water Storage | No definition available. | | Water Treatment | No definition available. | | Watercress Bed | No definition available. | | Waterway | No definition available. | | Weighbridge / Load Gauge | No definition available. | | Weir | No definition available. | | Well | No definition available. | | Well / Spring | No definition available. | | Wholesale Distribution | No definition available. | | Wildlife / Zoological Park | No definition available. | | Wildlife Sports Facility | No definition available. | | Wind Farm | No definition available. | | Wind Sock / Wind Tee | No definition available. | | Wind Turbine | No definition available. | | Windmill (Inactive) | No definition available. | | Winery | No definition available. | | Winter Sports Facility | No definition available. | | Woodland | No definition available. | | Workshop / Light Industrial | No definition available. | | Youth Hostel | No definition available. | | Youth Organisation Camp | No definition available. | | Youth Recreational / Social Club | No definition available. | | Zoo / Theme Park | No definition available. | --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.os.uk/osngd/code-lists/code-lists-overview/addressclassificationdescriptionvalue.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.