{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.c-segment","code":"thing-q13266730","url":"https://ver.cy/models/thing/q13266730/","name":"C-segment","alternateNames":["Citroën DS4","Volkswagen Pointer","Volkswagen Golf Mk3","Volkswagen Golf Mk2","Volkswagen Golf Mk6","Volkswagen Golf Mk4","SEAT Malaga","Volkswagen Golf Mk1","Fiat 1100-103","SEAT Ronda","SEAT 131","Chevrolet Astra"],"kind":"thing","status":"published","version":"0.2.0-wave.3","language":"en","classifiers":{"family":"Thing Registry","category":"Physical world and living systems","entryKind":"thing","plane":"PHY","domain":["PHY.OBJ"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"A European car classification for compact or small family cars, between the B-segment superminis and the D-segment large family cars, typically about 4.2 to 4.6 metres long, exemplified by the Volkswagen Golf across its generations, the Ford Focus, Toyota Corolla, Peugeot 308 and Citroen DS4; the C-segment is one of the largest market segments in Europe and worldwide and includes hatchback, saloon, estate and crossover body styles.","purpose":"Let an agent explain the C-segment classification, identify typical models and body styles, relay market data and regulatory context, and distinguish it from adjacent segments and from other classification systems.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["Compact family size","Golf-class benchmark","Many body styles","Informal European convention"],"structure":{"bundles":[{"id":"understand","name":"Understand","description":"What the C-segment is.","layers":[{"id":"definition","name":"Definition","description":"Definition and boundaries.","findings":[{"id":"definition-finding","name":"Definition","description":"Definition.","questions":[{"text":"What is the C-segment, and how is it bounded?","kind":"definition"},{"text":"Is the car C-segment, B-segment, D-segment or classified under another system?","kind":"boundary"}]}]},{"id":"models","name":"Models","description":"Typical models.","findings":[{"id":"models-finding","name":"Models","description":"Models.","questions":[{"text":"Which models define the segment, from the Golf onward?","kind":"definition"},{"text":"Which entry fits the specific model?","kind":"action"}]}]}]},{"id":"market","name":"Market","description":"Market.","layers":[{"id":"sales","name":"Sales","description":"Sales and trends.","findings":[{"id":"sales-finding","name":"Sales","description":"Sales.","questions":[{"text":"How large is the segment, and how is it changing with crossovers and electrification, with sources?","kind":"provenance"},{"text":"Which sources are cited?","kind":"provenance"}]}]},{"id":"brands","name":"Brands","description":"Brands and competition.","findings":[{"id":"brands-finding","name":"Brands","description":"Brands.","questions":[{"text":"Which manufacturers compete in the segment, and how?","kind":"provenance"},{"text":"Is the information current?","kind":"boundary"}]}]}]},{"id":"evaluate","name":"Evaluate","description":"Comparison and regulation.","layers":[{"id":"comparison","name":"Comparison","description":"Comparing cars.","findings":[{"id":"comparison-finding","name":"Comparison","description":"Comparison.","questions":[{"text":"What criteria do reviewers and consumer bodies use to compare C-segment cars, in general terms?","kind":"provenance"},{"text":"Is the user asking for a personal purchase recommendation, which needs current local information?","kind":"boundary"}]}]},{"id":"regulation","name":"Regulation","description":"Safety and emissions.","findings":[{"id":"regulation-finding","name":"Regulation","description":"Regulation.","questions":[{"text":"How do safety ratings and emissions rules apply to C-segment cars?","kind":"provenance"},{"text":"Which references are standard?","kind":"provenance"}]}]}]},{"id":"context","name":"Context","description":"History and systems.","layers":[{"id":"history","name":"History","description":"History.","findings":[{"id":"history-finding","name":"History","description":"History.","questions":[{"text":"How did the compact family car segment develop, from the Golf Mk1 onward?","kind":"provenance"},{"text":"Which entry fits the history of the Volkswagen Golf?","kind":"action"}]}]},{"id":"systems","name":"Systems","description":"Other classification systems.","findings":[{"id":"systems-finding","name":"Systems","description":"Systems.","questions":[{"text":"How do US, Japanese and other classifications compare with the European segments?","kind":"provenance"},{"text":"Which entry fits car classification?","kind":"action"}]}]}]}]},"agentConduct":{"may":["Classify a car model into the segment and state the criteria used.","Compare models within the segment on published specifications and test results."],"mustNot":["Present segment placement as an official or legal classification.","Quote safety or emissions ratings from a different generation or market version.","Claim a model's rating applies to trims or markets it was not tested in.","Present marketing copy as independent test results."],"requiresHuman":["Publishing comparisons used in fleet or procurement decisions."]},"ethics":{"considerations":["Buyers rely on class comparisons for safety and running cost decisions.","Ratings differ by market, and mixing them up misleads people about crash protection."],"affectedParties":["Car buyers","Fleet operators","Other road users"]},"owners":{"steward":"Nobody owns a market classification; manufacturers and testing bodies answer for the model data.","roles":[],"masterSystems":["Type approval records of vehicle authorities"]},"relations":[{"target":"Q1420","type":"parent","note":"registry parent class"},{"target":"car","type":"related","note":"in registry terms, as a class"},{"target":"Volkswagen Golf","type":"related","note":"the benchmark model"},{"target":"B-segment","type":"related","note":"the smaller class"},{"target":"D-segment","type":"related","note":"the larger class"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.c-segment","Wikidata: Q13266730 (https://www.wikidata.org/wiki/Q13266730)"]},"properties":{"applicability":"required","items":["typical length: about 4.2-4.6 m","share of European market: about 20-25 percent - varies by year"]},"recognition":{"applicability":"required","items":["European compact car segment","Golf, Focus, Corolla, 308, DS4 and similar","B-segment cars are smaller superminis; D-segment cars are larger family cars; US compact class overlaps but differs","Compact hatchbacks, saloons and estates about 4.2 to 4.6 metres long."]},"capabilities":{"applicability":"required","items":["explain the classification","identify typical models","relay market data","distinguish from other segments"]},"hazards":{"applicability":"required","items":["Blurred boundaries between segments","Confusing with other classification systems","Stale model information"]},"interfaces":{"applicability":"required","items":["European Commission segment definitions used in market analysis","Euro NCAP categories","Emissions and safety rules applying by vehicle type"]},"context":{"applicability":"required","items":["Classifying compact family cars.","C-segment hatchbacks","C-segment saloons and estates","C-segment crossovers and SUVs","premium C-segment cars","specific models such as the Volkswagen Golf generations and Citroen DS4"]}},"sources":[{"title":"Wikidata item Q13266730: C-segment","url":"https://www.wikidata.org/wiki/Q13266730","note":"identity and sense of the item"},{"title":"Wikipedia: C-segment","url":"https://en.wikipedia.org/wiki/C-segment","note":"general description of the item"}],"openQuestions":["Should compact car be the primary linked entry?","How should market data be linked?","The registry entry has merged aliases naming specific models; should they be split off?"],"resources":{"spec":"/models/things/publications/thing-q13266730/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q13266730/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-13T01:10:31Z","builder":"tools/build_cards.py@1.0.0"},"completeness":{"sections":{"classifiers":"filled","whatItIs":"filled","purpose":"filled","distinguishingFeatures":"filled","structure":"filled","agentConduct":"filled","ethics":"filled","owners":"filled","relations":"filled","interaction.identity":"filled","interaction.properties":"filled","interaction.recognition":"filled","interaction.capabilities":"filled","interaction.hazards":"filled","interaction.interfaces":"filled","interaction.context":"filled","sources":"filled"},"notes":{"_gate":"Published through the thing publication gate 1.0 on 2026-10-06T19:51:54+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass"},"score":1.0}}