{"source":{"url":"https://ontology.live/o/property-listing-ontology-6acc89","author":"@ssergienko","license":"CC BY 4.0","licenseUrl":"https://creativecommons.org/licenses/by/4.0/","publishedAt":"2026-10-21T19:39:45.145Z"},"ontology":{"name":"Property Listing Ontology","description":"Models short-form residential real estate advertisements for sale or rent, covering the property, price and terms, features, location, and agent contact details. Used to generate new realistic listings across markets and transaction types.","domain":"realestate"},"graph":{"nodes":[{"id":"listing","type":"class","label":"Property Listing","description":"A compact advertisement document with a headline, a terms line, and dense factual fragments.","semantics":"Root entity; its transaction type determines which terms and fields appear.","examples":["FOR SALE — 3-bed semi-detached house","For rent: Bright 2BR/1BA apartment"]},{"id":"property","type":"class","label":"Property","description":"The physical dwelling being advertised.","semantics":"Varies in type, size, age, and condition.","examples":["semi-detached house","apartment unit"]},{"id":"transaction_type","type":"dimension","label":"Transaction Type","description":"Whether the property is offered for sale or for rent.","semantics":"Drives pricing format, legal terms, and requirements sections.","examples":["sale","rent"]},{"id":"market_region","type":"dimension","label":"Market / Region Convention","description":"Country-specific conventions for currency, units, abbreviations, and legal terms.","semantics":"UK uses £, m²/sq ft, EPC, council tax, freehold; US uses $, sq ft, BR/BA, Walk Score, deposits.","examples":["UK","US"]},{"id":"price","type":"property","label":"Price","description":"Asking price or periodic rent.","semantics":"Sale: lump sum; rent: per month. Scales with size, location, and condition.","examples":["£325,000","$2,150/month"]},{"id":"price_history","type":"property","label":"Price History","description":"Reductions or changes since listing.","semantics":"Optional, mostly for sales; includes the previous price and date.","examples":["reduced from £335,000 on 20 Oct 2026"]},{"id":"property_type","type":"property","label":"Property Type","description":"Building style or unit form.","semantics":"Selects the vocabulary used in the headline and features.","examples":["semi-detached house","apartment","terraced house","condo"]},{"id":"bedrooms_bathrooms","type":"property","label":"Bedrooms & Bathrooms","description":"Room counts, sometimes with a breakdown.","semantics":"Shown in the headline and features; written as '3-bed' or '2BR/1BA'.","examples":["3 bedrooms (2 double, 1 single)","2BR/1BA"]},{"id":"floor_area","type":"property","label":"Floor Area","description":"Interior size.","semantics":"Units follow region; may be given in dual units.","examples":["98 m² / 1,055 sq ft","870 sq ft"]},{"id":"age_condition","type":"property","label":"Build Year & Renovation","description":"Year built and any upgrades.","semantics":"Supports value claims; renovations are listed with specifics.","examples":["Built 1935, renovated 2021 (new roof, rewiring)","built 2015"]},{"id":"tenure","type":"property","label":"Tenure / Lease Term","description":"Ownership form for sales or lease length for rentals.","semantics":"Sale: freehold or leasehold; rent: lease duration.","examples":["Freehold","12-month lease"]},{"id":"regulatory_ratings","type":"property","label":"Regulatory & Tax Ratings","description":"Official ratings and bands.","semantics":"Region-specific; appears in sale header lines.","examples":["Council tax band C","EPC rating C (72)"]},{"id":"features","type":"property","label":"Key Features / Amenities","description":"Bulleted or comma-separated selling points inside and outside the unit.","semantics":"Varies by property class; includes kitchen layout, garden, balcony, appliances, and building facilities.","examples":["open-plan kitchen/diner","in-unit washer/dryer","rooftop terrace"]},{"id":"parking","type":"property","label":"Parking","description":"Parking provision, with a cost for rentals.","semantics":"Included for sales; an optional paid add-on for rentals.","examples":["Off-street parking for 2 cars","1 garage space +$150/month"]},{"id":"outdoor_space","type":"property","label":"Outdoor Space & Orientation","description":"Garden, balcony, or terrace and its aspect or view.","semantics":"Houses favour gardens; apartments favour balconies and views.","examples":["south-facing garden","balcony with river view"]},{"id":"location","type":"class","label":"Location Context","description":"Address area and proximity information.","semantics":"Headline names the street or neighbourhood; body adds distances and scores.","examples":["Leeds LS6","Riverside, Portland OR"]},{"id":"proximity","type":"property","label":"Proximity & Walkability","description":"Distances to transit and schools, or walkability scores.","semantics":"UK: miles to station and school with Ofsted rating; US: Walk and Transit Scores.","examples":["0.4 miles to Headingley station","Walk Score 92"]},{"id":"availability","type":"property","label":"Availability & Chain Status","description":"Move-in date for rentals; onward chain status for sales.","semantics":"Rentals state a date; sales state chain status.","examples":["Available Dec 1, 2026","no onward chain"]},{"id":"rental_costs","type":"class","label":"Rental Costs & Utilities","description":"Deposits, utility arrangements, and fees beyond rent.","semantics":"Rentals only; states who pays which utilities and any flat fees.","examples":["Security deposit $2,150","water/sewer/trash $85 flat"]},{"id":"pet_policy","type":"property","label":"Pet Policy","description":"Rules and fees for pets.","semantics":"Rentals only; includes limits and deposit or rent amounts.","examples":["cats and dogs under 40 lbs OK, $300 deposit + $35/month"]},{"id":"tenant_requirements","type":"constraint","label":"Tenant Requirements","description":"Screening criteria for renters.","semantics":"Includes income multiples, credit check, and smoking rules.","examples":["income 2.5× rent","credit check","no smoking"]},{"id":"viewing_info","type":"property","label":"Viewing Arrangements","description":"How and when to view.","semantics":"Open house slots for sales; self-guided or scheduled tours for rentals.","examples":["Saturday open house 10:00–12:00","Self-guided tours available 7 days"]},{"id":"agent","type":"class","label":"Agent / Managing Company","description":"Estate agent or property manager.","semantics":"Fictional agency name plus a reference code.","examples":["Example Estates","Example Property Management"]},{"id":"listing_ref","type":"property","label":"Listing Reference","description":"Agency-specific ID code.","semantics":"Prefix plus digits, tied to the agency.","examples":["ref EE-0001","listing #EPM-0002"]},{"id":"listing_date","type":"property","label":"Listing Date","description":"When the property was listed.","semantics":"Optional; precedes any price-change date.","examples":["Listed: 12 Oct 2026"]},{"id":"val_sale","type":"value","label":"For Sale","description":"Sale transaction value.","semantics":"Triggers tenure, chain, council tax, EPC, and open-house fields.","examples":["FOR SALE"]},{"id":"val_rent","type":"value","label":"For Rent","description":"Rental transaction value.","semantics":"Triggers lease, deposit, utilities, pets, and requirements fields.","examples":["For rent"]},{"id":"style_terse","type":"constraint","label":"Terse Fragmentary Style","description":"Listings use fragments, bullets, pipes, and middots rather than prose.","semantics":"Short facts separated by | · or line breaks; headline first, then terms, features, location, contact.","examples":["Asking price: £325,000 | Tenure: Freehold"]},{"id":"consistency_rule","type":"constraint","label":"Internal Consistency","description":"Numbers and units must agree and be plausible for the market.","semantics":"Deposit is related to rent; price history dates follow the listing date; units match the region; room counts are consistent.","examples":["Reduced price is lower than the original","Deposit equals one month's rent"]},{"id":"section_order","type":"constraint","label":"Section Order","description":"Typical order of content blocks.","semantics":"Headline, price/terms line, features or amenities, costs/policies, location, contact.","examples":["Headline → price line → features → location → agent"]}],"edges":[{"source":"listing","target":"property","label":"advertises","type":"has_property"},{"source":"listing","target":"transaction_type","label":"varies by","type":"has_property"},{"source":"transaction_type","target":"val_sale","label":"value","type":"has_value"},{"source":"transaction_type","target":"val_rent","label":"value","type":"has_value"},{"source":"listing","target":"market_region","label":"follows conventions of","type":"relates_to"},{"source":"listing","target":"price","label":"states","type":"has_property"},{"source":"price","target":"price_history","label":"may change via","type":"relates_to"},{"source":"property","target":"property_type","label":"is of type","type":"has_property"},{"source":"property","target":"bedrooms_bathrooms","label":"has","type":"has_property"},{"source":"property","target":"floor_area","label":"has","type":"has_property"},{"source":"property","target":"age_condition","label":"has","type":"has_property"},{"source":"property","target":"features","label":"offers","type":"has_property"},{"source":"features","target":"parking","label":"includes","type":"part_of"},{"source":"features","target":"outdoor_space","label":"includes","type":"part_of"},{"source":"val_sale","target":"tenure","label":"requires","type":"relates_to"},{"source":"val_sale","target":"regulatory_ratings","label":"includes","type":"relates_to"},{"source":"val_sale","target":"availability","label":"chain status","type":"relates_to"},{"source":"val_rent","target":"availability","label":"move-in date","type":"relates_to"},{"source":"val_rent","target":"tenure","label":"lease term","type":"relates_to"},{"source":"val_rent","target":"rental_costs","label":"requires","type":"relates_to"},{"source":"val_rent","target":"pet_policy","label":"may include","type":"relates_to"},{"source":"val_rent","target":"tenant_requirements","label":"imposes","type":"relates_to"},{"source":"rental_costs","target":"parking","label":"may charge for","type":"relates_to"},{"source":"listing","target":"location","label":"situated in","type":"has_property"},{"source":"location","target":"proximity","label":"described by","type":"has_property"},{"source":"listing","target":"viewing_info","label":"offers","type":"has_property"},{"source":"listing","target":"agent","label":"handled by","type":"has_property"},{"source":"agent","target":"listing_ref","label":"assigns","type":"has_property"},{"source":"listing","target":"listing_date","label":"dated","type":"has_property"},{"source":"style_terse","target":"listing","label":"constrains","type":"constrains"},{"source":"consistency_rule","target":"listing","label":"constrains","type":"constrains"},{"source":"section_order","target":"listing","label":"constrains","type":"constrains"},{"source":"market_region","target":"floor_area","label":"sets units","type":"constrains"},{"source":"market_region","target":"regulatory_ratings","label":"determines","type":"constrains"},{"source":"market_region","target":"proximity","label":"determines format","type":"constrains"}]},"pipeline":{"classes":[{"id":"listing","label":"Property Listing","description":"A compact advertisement document with a headline, a terms line, and dense factual fragments.","parent":null,"properties":[{"id":"property","label":"Property","description":"The physical dwelling being advertised.","examples":["semi-detached house","apartment unit"]},{"id":"transaction_type","label":"Transaction Type","description":"Whether the property is offered for sale or for rent.","examples":["sale","rent"]},{"id":"price","label":"Price","description":"Asking price or periodic rent.","examples":["£325,000","$2,150/month"]},{"id":"location","label":"Location Context","description":"Address area and proximity information.","examples":["Leeds LS6","Riverside, Portland OR"]},{"id":"viewing_info","label":"Viewing Arrangements","description":"How and when to view.","examples":["Saturday open house 10:00–12:00","Self-guided tours available 7 days"]},{"id":"agent","label":"Agent / Managing Company","description":"Estate agent or property manager.","examples":["Example Estates","Example Property Management"]},{"id":"listing_date","label":"Listing Date","description":"When the property was listed.","examples":["Listed: 12 Oct 2026"]}],"relations":[{"type":"relates_to","target":"Market / Region Convention","label":"follows conventions of"}],"examples":["FOR SALE — 3-bed semi-detached house","For rent: Bright 2BR/1BA apartment"]},{"id":"property","label":"Property","description":"The physical dwelling being advertised.","parent":null,"properties":[{"id":"property_type","label":"Property Type","description":"Building style or unit form.","examples":["semi-detached house","apartment","terraced house","condo"]},{"id":"bedrooms_bathrooms","label":"Bedrooms & Bathrooms","description":"Room counts, sometimes with a breakdown.","examples":["3 bedrooms (2 double, 1 single)","2BR/1BA"]},{"id":"floor_area","label":"Floor Area","description":"Interior size.","examples":["98 m² / 1,055 sq ft","870 sq ft"]},{"id":"age_condition","label":"Build Year & Renovation","description":"Year built and any upgrades.","examples":["Built 1935, renovated 2021 (new roof, rewiring)","built 2015"]},{"id":"features","label":"Key Features / Amenities","description":"Bulleted or comma-separated selling points inside and outside the unit.","examples":["open-plan kitchen/diner","in-unit washer/dryer","rooftop terrace"]}],"relations":[],"examples":["semi-detached house","apartment unit"]},{"id":"location","label":"Location Context","description":"Address area and proximity information.","parent":null,"properties":[{"id":"proximity","label":"Proximity & Walkability","description":"Distances to transit and schools, or walkability scores.","examples":["0.4 miles to Headingley station","Walk Score 92"]}],"relations":[],"examples":["Leeds LS6","Riverside, Portland OR"]},{"id":"rental_costs","label":"Rental Costs & Utilities","description":"Deposits, utility arrangements, and fees beyond rent.","parent":null,"properties":[],"relations":[{"type":"relates_to","target":"Parking","label":"may charge for"}],"examples":["Security deposit $2,150","water/sewer/trash $85 flat"]},{"id":"agent","label":"Agent / Managing Company","description":"Estate agent or property manager.","parent":null,"properties":[{"id":"listing_ref","label":"Listing Reference","description":"Agency-specific ID code.","examples":["ref EE-0001","listing #EPM-0002"]}],"relations":[],"examples":["Example Estates","Example Property Management"]}],"dimensions":[{"id":"transaction_type","label":"Transaction Type","description":"Whether the property is offered for sale or for rent.","values":["For Sale","For Rent"]},{"id":"market_region","label":"Market / Region Convention","description":"Country-specific conventions for currency, units, abbreviations, and legal terms.","values":[]}],"constraints":[{"id":"tenant_requirements","label":"Tenant Requirements","description":"Screening criteria for renters.","appliesTo":[]},{"id":"style_terse","label":"Terse Fragmentary Style","description":"Listings use fragments, bullets, pipes, and middots rather than prose.","appliesTo":["Property Listing"]},{"id":"consistency_rule","label":"Internal Consistency","description":"Numbers and units must agree and be plausible for the market.","appliesTo":["Property Listing"]},{"id":"section_order","label":"Section Order","description":"Typical order of content blocks.","appliesTo":["Property Listing"]}],"promptReady":"# Property Listing Ontology\n\nModels short-form residential real estate advertisements for sale or rent, covering the property, price and terms, features, location, and agent contact details. Used to generate new realistic listings across markets and transaction types.\n\n**Domain:** realestate\n\n## Classes\n\n### Property Listing\nA compact advertisement document with a headline, a terms line, and dense factual fragments.\n\n**Properties:**\n- Property: The physical dwelling being advertised.\n  Examples: semi-detached house, apartment unit\n- Transaction Type: Whether the property is offered for sale or for rent.\n  Examples: sale, rent\n- Price: Asking price or periodic rent.\n  Examples: £325,000, $2,150/month\n- Location Context: Address area and proximity information.\n  Examples: Leeds LS6, Riverside, Portland OR\n- Viewing Arrangements: How and when to view.\n  Examples: Saturday open house 10:00–12:00, Self-guided tours available 7 days\n- Agent / Managing Company: Estate agent or property manager.\n  Examples: Example Estates, Example Property Management\n- Listing Date: When the property was listed.\n  Examples: Listed: 12 Oct 2026\n\n**Relations:**\n- follows conventions of → Market / Region Convention\n\n**Examples:**\n- FOR SALE — 3-bed semi-detached house\n- For rent: Bright 2BR/1BA apartment\n\n### Property\nThe physical dwelling being advertised.\n\n**Properties:**\n- Property Type: Building style or unit form.\n  Examples: semi-detached house, apartment, terraced house, condo\n- Bedrooms & Bathrooms: Room counts, sometimes with a breakdown.\n  Examples: 3 bedrooms (2 double, 1 single), 2BR/1BA\n- Floor Area: Interior size.\n  Examples: 98 m² / 1,055 sq ft, 870 sq ft\n- Build Year & Renovation: Year built and any upgrades.\n  Examples: Built 1935, renovated 2021 (new roof, rewiring), built 2015\n- Key Features / Amenities: Bulleted or comma-separated selling points inside and outside the unit.\n  Examples: open-plan kitchen/diner, in-unit washer/dryer, rooftop terrace\n\n**Examples:**\n- semi-detached house\n- apartment unit\n\n### Location Context\nAddress area and proximity information.\n\n**Properties:**\n- Proximity & Walkability: Distances to transit and schools, or walkability scores.\n  Examples: 0.4 miles to Headingley station, Walk Score 92\n\n**Examples:**\n- Leeds LS6\n- Riverside, Portland OR\n\n### Rental Costs & Utilities\nDeposits, utility arrangements, and fees beyond rent.\n\n**Relations:**\n- may charge for → Parking\n\n**Examples:**\n- Security deposit $2,150\n- water/sewer/trash $85 flat\n\n### Agent / Managing Company\nEstate agent or property manager.\n\n**Properties:**\n- Listing Reference: Agency-specific ID code.\n  Examples: ref EE-0001, listing #EPM-0002\n\n**Examples:**\n- Example Estates\n- Example Property Management\n\n## Dimensions\n\n### Transaction Type\nWhether the property is offered for sale or for rent.\n**Values:** For Sale, For Rent\n\n### Market / Region Convention\nCountry-specific conventions for currency, units, abbreviations, and legal terms.\n\n## Constraints\n\n- **Tenant Requirements**: Screening criteria for renters.\n- **Terse Fragmentary Style** (Property Listing): Listings use fragments, bullets, pipes, and middots rather than prose.\n- **Internal Consistency** (Property Listing): Numbers and units must agree and be plausible for the market.\n- **Section Order** (Property Listing): Typical order of content blocks."}}