{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.caboose","code":"thing-q1470867","url":"https://ver.cy/models/thing/q1470867/","name":"caboose","alternateNames":["JNR Yo 2000","JNR Yo 3500","Yo 5000","JNR Yo 8000","JNR Yo 6000","JNR Yo 9000","Tobu Yo 101","KUR Caboose"],"kind":"thing","status":"published","version":"0.1.0-research.1","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 caboose is a railway vehicle traditionally attached to the rear of a freight train to accommodate the train crew and provide a position for observing the train, handling paperwork, and carrying equipment.","purpose":"Enable an AI agent to recognise a railway caboose, assess its crew-support and train-service condition, and determine appropriate operation, movement, preservation or reuse.","scope":{"in":["Caboose identity, original role and subsequent conversions","Crew compartment, observation arrangements and access","Running gear, couplings and train-brake interfaces","Crew facilities, onboard utilities and service equipment","Condition and suitability for railway movement, occupancy or static display"],"out":["Locomotive propulsion and train-level driving control","Freight wagon types whose principal purpose is carrying goods","Passenger coaches and their passenger-service requirements","End-of-train devices as independently modelled equipment","Railway operating organisations, routes and signalling systems","Shipboard galleys or other non-railway meanings of caboose"],"boundaries":[]},"distinguishingFeatures":["Its original or documented railway role supports freight-train crew duties rather than primarily carrying freight or passengers.","It has, or originally had, a crew-usable compartment; a rear marker or end-of-train device alone is not a caboose.","A cupola or projecting observation bay supports identification when present, but neither feature should be required without checking the variant.","Being the last vehicle in a train is insufficient for identification; design, fittings and service history must support the classification.","A static cabin or reused body qualifies through documented caboose origin, with its present railway capability recorded separately."],"structure":{"bundles":[{"id":"caboose-identity-and-lineage","name":"Caboose identity and lineage","description":"Establishes what makes the vehicle a caboose and how that identity survives changes of use.","layers":[{"id":"railway-role-boundary","name":"Railway role boundary","description":"Connects classification to the vehicle's intended freight-train crew role.","findings":[{"id":"documented-crew-service-role","name":"Documented crew-service role","description":"Record the evidence for classification and distinguish original purpose from later assignment.","questions":[{"text":"What documented crew duties led this vehicle type to be designated a caboose?","id":"documented-crew-service-role-q01","kind":"definition"},{"text":"Which features and records distinguish it from a passenger coach, brake van, riding car or ordinary freight wagon in the relevant railway vocabulary?","id":"documented-crew-service-role-q02","kind":"boundary"}]}]},{"id":"variant-and-conversion-history","name":"Variant and conversion history","description":"Tracks design variants, rebuilds and changes that affect recognition or capability.","findings":[{"id":"original-versus-present-arrangement","name":"Original versus present arrangement","description":"Separate the original caboose configuration from subsequent removals, additions and adaptations.","questions":[{"text":"Which railway diagrams, builder records or dated photographs establish the original observation and crew-compartment arrangement?","id":"original-versus-present-arrangement-q01","kind":"provenance"},{"text":"Which conversions changed its crew role or rail capability, and which identifying features remain?","id":"original-versus-present-arrangement-q02","kind":"boundary"}]}]}]},{"id":"crew-observation-and-accommodation","name":"Crew observation and accommodation","description":"Models the caboose as a workplace and shelter for train crew.","layers":[{"id":"observation-positions","name":"Observation positions","description":"Examines how crew reach and use windows, bays, cupolas or other viewing positions.","findings":[{"id":"usable-train-sightlines","name":"Usable train sightlines","description":"Record viewing directions, obstructions and access constraints for the installed observation arrangement.","questions":[{"text":"From which designated positions can crew observe the train or track, and what obstructs those views in the proposed consist?","id":"usable-train-sightlines-q01","kind":"measurement"},{"text":"What access, seating, glazing or guarding defects must be resolved before crew use those positions?","id":"usable-train-sightlines-q02","kind":"action"}]}]},{"id":"crew-space-and-provisions","name":"Crew space and provisions","description":"Connects the interior and its utilities to documented duties and occupancy needs.","findings":[{"id":"duty-appropriate-habitation","name":"Duty-appropriate habitation","description":"Inventory work, rest and sanitary facilities without treating optional fittings as universal.","questions":[{"text":"What crew complement and duty duration are documented, and which work surfaces, seats, berths or sanitary facilities support them?","id":"duty-appropriate-habitation-q01","kind":"provenance"},{"text":"Which heating, lighting, water or electrical supplies are fitted, and what replenishment or servicing do they require?","id":"duty-appropriate-habitation-q02","kind":"action"},{"text":"What evidence establishes that doors, exits, ventilation and any combustion appliances are suitable for the proposed occupancy?","id":"duty-appropriate-habitation-q03","kind":"action"}]}]}]},{"id":"train-integration-and-movement","name":"Train integration and movement","description":"Captures the caboose's mechanical and operational interfaces with a railway consist.","layers":[{"id":"running-gear-and-clearance","name":"Running gear and clearance","description":"Assesses the physical conditions for supporting and moving the caboose on rails.","findings":[{"id":"route-and-consist-fit","name":"Route and consist fit","description":"Relate measured geometry, wheel loading and coupling arrangements to a specific movement.","questions":[{"text":"What are its gauge, axle arrangement, mass and maximum envelope, including observation projections and roof fittings?","id":"route-and-consist-fit-q01","kind":"measurement"},{"text":"Do its couplers, drawgear, running gear and clearances meet the requirements of the proposed route and adjacent vehicles?","id":"route-and-consist-fit-q02","kind":"action"}]}]},{"id":"braking-and-train-end-equipment","name":"Braking and train-end equipment","description":"Records braking interfaces and equipment associated with the vehicle's assigned position and duty.","findings":[{"id":"verified-braking-and-end-functions","name":"Verified braking and end functions","description":"Distinguish equipment presence, function tests and operational requirements for a particular assignment.","questions":[{"text":"Which train-brake connections, crew-accessible brake controls and handbrake arrangements are fitted, and what tests establish their condition?","id":"verified-braking-and-end-functions-q01","kind":"provenance"},{"text":"For the proposed train position and operating rules, which markers, communications or other end-of-train functions must be provided?","id":"verified-braking-and-end-functions-q02","kind":"action"},{"text":"Which functions belong to separately fitted equipment rather than to the caboose itself?","id":"verified-braking-and-end-functions-q03","kind":"boundary"}]}]}]},{"id":"condition-serviceability-and-preservation","name":"Condition, serviceability and preservation","description":"Turns evidence about deterioration, inspection and alteration into use-specific decisions.","layers":[{"id":"caboose-condition-assessment","name":"Caboose condition assessment","description":"Examines the body, elevated or projecting observation structures, access and railway components.","findings":[{"id":"structural-and-access-defects","name":"Structural and access defects","description":"Locate deterioration in relation to load paths, crew access and weather exposure.","questions":[{"text":"What inspection evidence covers the underframe, body attachments, end platforms, steps and any cupola or bay-window supports?","id":"structural-and-access-defects-q01","kind":"provenance"},{"text":"Where have leakage, corrosion, timber decay or damaged glazing affected crew spaces or structural connections?","id":"structural-and-access-defects-q02","kind":"measurement"},{"text":"Which recorded defects prevent rail movement, entry or use of particular crew positions?","id":"structural-and-access-defects-q03","kind":"action"}]}]},{"id":"use-specific-release-and-conservation","name":"Use-specific release and conservation","description":"Separates movement, occupancy and preservation decisions and their supporting evidence.","findings":[{"id":"permitted-use-with-evidence","name":"Permitted use with evidence","description":"Record the inspections, responsible authorities and preservation choices supporting each proposed use.","questions":[{"text":"Which issuing bodies, operator requirements and inspection records govern this caboose's proposed movement or occupancy?","id":"permitted-use-with-evidence-q01","kind":"provenance"},{"text":"What repairs, tests or restrictions are required before the proposed use can proceed?","id":"permitted-use-with-evidence-q02","kind":"action"},{"text":"Which original crew fittings or observation features would a proposed restoration or conversion retain, remove or reconstruct?","id":"permitted-use-with-evidence-q03","kind":"boundary"}]}]}]},{"id":"evidence-and-external-alignment","name":"Evidence and external alignment","description":"What the world already says about this thing, gathered so the model can be checked against it.","layers":[{"id":"reported-evidence","name":"Reported evidence","description":"Findings from the breadth pass, kept separate from the structural claims.","findings":[{"id":"evidence-confidence-notes","name":"Check these first","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these check these first hold for the sense of caboose this model covers, and on what evidence?","id":"evidence-confidence-notes-q01","kind":"provenance"}]},{"id":"evidence-kinds","name":"Kinds and varieties","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these kinds and varieties hold for the sense of caboose this model covers, and on what evidence?","id":"evidence-kinds-q01","kind":"provenance"}]},{"id":"evidence-identifiers","name":"Identifiers and schemes","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these identifiers and schemes hold for the sense of caboose this model covers, and on what evidence?","id":"evidence-identifiers-q01","kind":"provenance"}]},{"id":"evidence-real-world-use","name":"Real-world use","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these real-world use hold for the sense of caboose this model covers, and on what evidence?","id":"evidence-real-world-use-q01","kind":"provenance"}]},{"id":"evidence-failure-modes-and-hazards","name":"Failure modes and hazards","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these failure modes and hazards hold for the sense of caboose this model covers, and on what evidence?","id":"evidence-failure-modes-and-hazards-q01","kind":"provenance"}]},{"id":"evidence-regional-variation","name":"Regional variation","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these regional variation hold for the sense of caboose this model covers, and on what evidence?","id":"evidence-regional-variation-q01","kind":"provenance"}]},{"id":"evidence-neighbours","name":"Neighbouring kinds and how to tell them apart","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these neighbouring kinds and how to tell them apart hold for the sense of caboose this model covers, and on what evidence?","id":"evidence-neighbours-q01","kind":"provenance"}]}]}]}]},"agentConduct":{"may":["Describe the caboose, its history and uses, citing railway sources.","Identify cabooses in photographs and museum collections."],"mustNot":["Enter or climb on rail vehicles on active tracks.","Move rolling stock without authority.","Misattribute restored cars' histories.","Encourage trespass on railway property."],"requiresHuman":["Moving historic rolling stock."]},"ethics":{"considerations":["Railway trespass kills people.","Railway heritage deserves preservation."],"affectedParties":["Railway workers","Trespassers","Museum visitors"]},"owners":{"steward":"The railway operator or museum that holds it.","roles":[],"masterSystems":["Railway rolling stock registers"]},"relations":[{"target":"Q3250739","type":"parent","note":"registry parent class"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.caboose","Wikidata: Q1470867 (https://www.wikidata.org/wiki/Q1470867)"]},"properties":{"applicability":"required","items":["Classification evidence: Builder records, railway diagrams, fleet records, photographs or collection documentation","Observation arrangement: Cupola, projecting bay, other arrangement, no dedicated projection, unknown","Original crew duties: Documented duties such as observation, paperwork, accommodation or switching support","Current use: Railway crew service, heritage operation, stored, static display, adapted occupancy, other, unknown","Overall envelope: Length, width and maximum height in mm, with measurement conditions","Mass and wheel loading: Vehicle mass and axle loads in kg, with loading condition","Running-gear configuration: Track gauge in mm; axle count; bogie or fixed-axle arrangement; documented component types","Brake configuration and readiness: Installed train-brake and handbrake arrangements; isolated, untested, defective or verified, with evidence date","Coupling interfaces: Coupler, drawgear, buffer and hose types as fitted","Crew facilities and utility sources: Inventory of seating, work surfaces, berths, heating, lighting, sanitation and their supplies where fitted","Movement and occupancy authority: Applicable jurisdiction, operator rules, inspection records and explicit restrictions"]},"recognition":{"applicability":"required","items":["A caboose usually has an enclosed crew compartment with windows rather than the largely windowless body of a boxcar.","Many examples have a raised roof cupola or projecting side bay windows for observing the train.","End platforms commonly carry railings, steps and a hand brake wheel.","Its railway wheelsets and couplers distinguish it from a road trailer or stationary cabin."]},"capabilities":{"applicability":"required","items":["Classify a candidate vehicle using its crew-service arrangement and documented history.","Compare its dimensions, running gear and interfaces with a proposed railway movement.","Assess whether its observation positions and crew compartment support a specified duty.","Identify inspections and repairs needed before movement or occupancy.","Plan preservation or conversion while recording losses of original caboose features."]},"hazards":{"applicability":"required","items":["Uncontrolled movement or coupling impacts can crush people and damage railway equipment.","Defective brakes, wheelsets or running gear can contribute to derailment or loss of control.","Deteriorated steps, platforms and handholds can cause falls.","Legacy coatings and insulation in preserved vehicles may expose occupants or maintenance workers to hazardous substances."]},"interfaces":{"applicability":"required","items":["Title 49 CFR Part 231, administered by the United States Federal Railroad Administration, prescribes railroad safety appliance requirements, including provisions for caboose cars."]},"context":{"applicability":"required","items":["Cabooses historically accompanied North American freight trains to provide crew accommodation, workspace and a position for observing the train.","They are now commonly encountered in railway museums, heritage operations and preserved displays, with some retained for specialized railway service."]}},"sources":[{"title":"Wikidata item Q1470867: caboose","url":"https://www.wikidata.org/wiki/Q1470867","note":"identity and sense of the item"},{"title":"Wikipedia: Caboose","url":"https://en.wikipedia.org/wiki/Caboose","note":"general description of the item"}],"openQuestions":["Does the registry provenance confirm the railway meaning of caboose, and does an existing world model already own this concept?","How should caboose relate to brake van, guard's van and riding car across railway traditions without creating duplicate concepts?","Which documented variants establish the limits of the category, including examples without cupolas or projecting observation bays?","Which authoritative railway sources provide variant-specific dimensions, capacities, equipment arrangements and maintenance requirements?","Which jurisdictional and operator rules apply to present-day caboose movement and crew occupancy, and how do they differ from static display requirements?"],"resources":{"spec":"/models/things/publications/thing-q1470867/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q1470867/spec.json"],"providers":["Codex"],"researchStatus":"unreviewed","generatedAt":"2026-09-12T08:18:52Z","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 2026-10-07T10:10:26+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass"},"score":1.0}}