{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.hundredweight","code":"thing-q1267081","url":"https://ver.cy/models/thing/q1267081/","name":"hundredweight","alternateNames":[],"kind":"thing","status":"research-draft","version":"0.2.0-wave.2","language":"en","classifiers":{"family":"Thing Registry","category":"Cross-cutting context","entryKind":"thing","plane":"XCT","domain":["XCT.QTY"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"A unit of mass in the imperial and United States customary systems, equal to one hundred and twelve pounds as the long hundredweight used in the United Kingdom and to one hundred pounds as the short hundredweight used in the United States, abbreviated cwt, historically used for trading commodities such as grain, coal and livestock and still used in some agricultural markets; the hundredweight is one twentieth of the corresponding long or short ton.","purpose":"Let an agent explain the hundredweight and its long and short forms, support conversions to pounds, kilograms and tons, describe its historical and current uses, and prevent confusion between the two systems.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["Two values","One twentieth of a ton","Commodity trade use","Historical"],"structure":{"bundles":[{"id":"understand","name":"Understand","description":"What a hundredweight is.","layers":[{"id":"concept","name":"Concept","description":"Definition and forms.","findings":[{"id":"concept-finding","name":"Concept","description":"Concept.","questions":[{"text":"What is a hundredweight, and how do the long and short forms differ?","kind":"definition"},{"text":"Which system is meant?","kind":"boundary"}]}]},{"id":"relations","name":"Relations","description":"Relations to other units.","findings":[{"id":"relations-finding","name":"Relations","description":"Relations.","questions":[{"text":"How does the hundredweight relate to the pound, stone, quarter, ton and kilogram?","kind":"definition"},{"text":"Which entry fits the imperial system?","kind":"action"}]}]}]},{"id":"convert","name":"Convert","description":"Conversion.","layers":[{"id":"convert","name":"Convert","description":"Converting.","findings":[{"id":"convert-finding","name":"Convert","description":"Conversion.","questions":[{"text":"How can this quantity be converted between hundredweights, pounds and kilograms?","kind":"action"},{"text":"Which units apply?","kind":"measurement"}]}]},{"id":"reading","name":"Reading","description":"Reading historical figures.","findings":[{"id":"reading-finding","name":"Reading","description":"Reading.","questions":[{"text":"How should hundredweight figures in historical records and prices be interpreted?","kind":"action"},{"text":"Which entry fits historical metrology?","kind":"action"}]}]}]},{"id":"use","name":"Use","description":"Uses.","layers":[{"id":"trade","name":"Trade","description":"Commodity trade.","findings":[{"id":"trade-finding","name":"Trade","description":"Trade.","questions":[{"text":"Where is the hundredweight still used in agricultural and commodity markets?","kind":"provenance"},{"text":"Is the information current?","kind":"boundary"}]}]},{"id":"law","name":"Law","description":"Legal status.","findings":[{"id":"law-finding","name":"Law","description":"Law.","questions":[{"text":"What is the legal status of the hundredweight for trade in different countries?","kind":"provenance"},{"text":"Which entry fits weights and measures law?","kind":"action"}]}]}]},{"id":"learn","name":"Learn","description":"History and teaching.","layers":[{"id":"history","name":"History","description":"History.","findings":[{"id":"history-finding","name":"History","description":"History.","questions":[{"text":"How did the hundredweight arise, and why do the long and short values differ?","kind":"provenance"},{"text":"Which references are standard?","kind":"provenance"}]}]},{"id":"teach","name":"Teach","description":"Teaching.","findings":[{"id":"teach-finding","name":"Teach","description":"Teaching.","questions":[{"text":"How can traditional units be taught alongside metric?","kind":"action"},{"text":"Which misconceptions arise?","kind":"provenance"}]}]}]}]},"agentConduct":{"may":["Convert hundredweight to kilograms, stating whether the long or short hundredweight is meant.","Explain the historical use of the unit in trade."],"mustNot":["Mix long and short hundredweight in one calculation or record.","Use the hundredweight in trade where law requires metric units.","Misstate loads to exceed vehicle or lifting limits.","Assume the British value for a United States document or the reverse."],"requiresHuman":["Using converted weights for lifting, loading or legal trade."]},"ethics":{"considerations":["Unit confusion can overload vehicles and lifting gear.","Honest weights protect buyers and sellers."],"affectedParties":["Buyers and sellers","Drivers and crane operators","Historians"]},"owners":{"steward":"Nobody: a customary unit defined by law in the countries that use it.","roles":[],"masterSystems":[]},"relations":[{"target":"Q3647172","type":"parent","note":"registry parent class"},{"target":"unit of mass","type":"related","note":"category"},{"target":"dry unit","type":"related","note":"another traditional measurement unit entry"},{"target":"coal","type":"related","note":"a commodity traded by the hundredweight"},{"target":"mark","type":"related","note":"another historical unit that began as a weight"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.hundredweight","Wikidata: Q1267081 (https://www.wikidata.org/wiki/Q1267081)"]},"properties":{"applicability":"not-applicable","items":[]},"recognition":{"applicability":"optional","items":["One hundred and twelve or one hundred pounds","Long hundredweight and short hundredweight","The quintal is a metric hundred kilograms; the stone is fourteen pounds","Not physical; a unit."]},"capabilities":{"applicability":"required","items":["explain long and short forms","support conversions","describe uses","prevent confusion"]},"hazards":{"applicability":"required","items":["Confusing long and short hundredweight","Conversion errors","Assuming the unit is still legal for trade everywhere"]},"interfaces":{"applicability":"required","items":["Weights and measures legislation","Commodity market conventions","Metrication policies"]},"context":{"applicability":"required","items":["Imperial and customary mass unit.","long hundredweight","short hundredweight","hundredweight in commodity pricing","historical hundredweights of other values","related units such as the quarter and the ton"]}},"sources":[],"openQuestions":["Should imperial mass units be a single entry?","How should weights and measures law be linked?","How should commodity conventions be linked?"],"resources":{"spec":"/models/things/publications/thing-q1267081/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q1267081/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-12T05:28:14Z","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":"not-applicable","interaction.recognition":"filled","interaction.capabilities":"filled","interaction.hazards":"filled","interaction.interfaces":"filled","interaction.context":"filled","sources":"missing"},"notes":{"interaction.properties":"Plane XCT: no invented physical properties.","sources":"Written from model knowledge without web access; claims are unverified."},"score":0.938}}