{ "vercy": "1.0-draft", "publication": { "status": "research-draft", "adjudicationStatus": "unreviewed", "publishableCanonical": false, "generatedAt": "2026-09-13T04:13:24Z", "providers": [ "Claude" ], "breadth": "written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify", "pass": 2, "wave": 3, "engine": "claude", "enrichment": { "pass": 3, "engine": "claude", "producedAt": "2026-10-06T10:00:00Z", "ingestedAt": "2026-10-06T07:05:45+00:00", "fields": [ "agent_conduct", "ethics", "owners" ] }, "gate": { "passed": true, "version": "1.0", "at": "2026-10-06T19:52:02+00:00", "evidence": [ "completeness 1.00", "sense: Wikidata description", "2 live sources", "review by codex: pass" ] } }, "metaModel": { "id": "THING-Q785745", "registryId": "vr.tr.tank-locomotive", "name": "tank locomotive", "version": "0.2.0-wave.3", "entryKind": "thing", "family": "Thing Registry", "domain": [ "PHY.OBJ" ], "status": "research-draft" }, "canonicalUrl": "https://ver.cy/models/thing/q785745/", "model": { "registry_id": "vr.tr.tank-locomotive", "name": "tank locomotive", "purpose": "Let an agent explain tank locomotives and their types, relay design, uses and notable classes from railway history sources, describe preservation, and distinguish tank locomotives from tender locomotives.", "definition": "A steam locomotive that carries its own fuel and water in tanks and bunkers mounted on the locomotive frame rather than in a separate tender, in forms such as side tanks, saddle tanks, pannier tanks and well tanks, and articulated types such as the Fairlie, built for shunting, suburban, branch line and industrial service worldwide, with examples from the Austrian kkStB 4.0, the New Zealand B and E classes, the Cape Government Railways Fairlie 0-6-6-0 to the Greek OSE class Z; tank locomotives were widespread on narrow gauge and preserved railways.", "what_it_is_for": "Hauling trains without a tender.", "affordances": [ "explain types and design", "relay uses and classes", "describe preservation", "distinguish from tender locomotives" ], "distinguishing_features": [ "Onboard water and fuel", "Bidirectional running", "Short-range service", "Many tank layouts" ], "appearance": "A steam locomotive with water tanks beside or over the boiler and a coal bunker behind the cab.", "visual_identification": [ "Steam locomotive with onboard tanks", "Side, saddle, pannier and well tanks; Fairlie and other articulated tank types; classes such as kkStB 4.0, NZR B and E, OSE class Z", "Tender locomotives tow a separate tender; diesel and electric locomotives are not steam" ], "physical_properties": [ { "quantity": "typical water capacity", "typical_range": "about 2000-10000", "unit": "litres", "note": "" }, { "quantity": "wheel arrangements", "typical_range": "from 0-4-0T to 2-8-4T and articulated", "unit": "range", "note": "" } ], "families_and_kinds": [ "side tank locomotives", "saddle tank locomotives", "pannier tank locomotives", "well tank locomotives", "articulated tank types such as Fairlie, Garratt and Mallet tanks", "industrial and narrow gauge tank locomotives", "notable classes such as kkStB 4.0, NZR B class, NZR E class, CGR Fairlie 0-6-6-0, CCFPP 1 and 2, OSE class Z" ], "related_models": [ { "relation": "is a kind of", "target": "steam locomotive", "why": "in registry terms" }, { "relation": "is contrasted with", "target": "tender locomotive", "why": "which tows a tender" }, { "relation": "was used for", "target": "shunting", "why": "and suburban service" }, { "relation": "is preserved on", "target": "heritage railway", "why": "lines worldwide" } ], "identifiers": [], "standards_and_regulation": [ "Historical railway engineering standards", "Boiler inspection rules for preserved locomotives", "Heritage railway safety regulation" ], "failure_modes_and_hazards": [ "Limited range from small tanks", "Boiler safety in preservation", "Confusing tank layouts and classes" ], "in_scope": [], "out_of_scope": [], "characteristics": [], "agent_conduct": { "may": [ "Explain tank locomotive layouts such as side, saddle, pannier and well tanks, citing railway history sources.", "Identify a preserved tank locomotive from its class and builder records.", "Report the condition of a locomotive to the preservation group that keeps it." ], "must_not": [ "Operate a steam locomotive without the qualified crew and boiler certification its railway requires.", "Report a boiler as fit for steaming without a valid inspection.", "Move a locomotive on a running line without authority from the railway operator.", "Remove parts or fittings from a preserved locomotive without the owner's consent." ], "requires_human": [ "Approving a steam locomotive for passenger service after overhaul." ] }, "ethics": { "considerations": [ "Steam boilers store dangerous energy; failures have killed crews and bystanders.", "Preserved locomotives are shared heritage kept by volunteers and trusts." ], "affected_parties": [ "Crews and volunteers", "Passengers and spectators", "Heritage railway owners" ] }, "owners": { "steward": "The owner of the locomotive, often a heritage railway or trust; the railway safety authority licenses its operation.", "master_systems": [ "Heritage railway and rolling stock registers" ] } }, "sources": [ { "id": "wikidata", "title": "Wikidata item Q785745: tank locomotive", "url": "https://www.wikidata.org/wiki/Q785745", "url_status": "live", "what_it_supports": "identity and sense of the item", "checked_by": "wikidata-api" }, { "id": "wikipedia-en", "title": "Wikipedia: Tank locomotive", "url": "https://en.wikipedia.org/wiki/Tank_locomotive", "url_status": "live", "what_it_supports": "general description of the item", "checked_by": "wikidata-api sitelink" } ], "structure": { "bundles": [ { "id": "understand", "name": "Understand", "description": "What a tank locomotive is.", "rationale": "Definition.", "layers": [ { "id": "definition", "name": "Definition", "description": "Definition and types.", "findings": [ { "id": "definition-finding", "name": "Definition", "description": "Definition.", "questions": [ { "text": "What is a tank locomotive, and how do side, saddle, pannier and well tanks differ?", "kind": "definition" }, { "text": "Is the question about tank locomotives in general, a specific class or a tender locomotive?", "kind": "boundary" } ] } ] }, { "id": "design", "name": "Design", "description": "Design trade-offs.", "findings": [ { "id": "design-finding", "name": "Design", "description": "Design.", "questions": [ { "text": "Why were tank locomotives chosen for shunting and suburban work, and what limited them?", "kind": "definition" }, { "text": "Which entry fits the specific layout?", "kind": "action" } ] } ] } ] }, { "id": "classes", "name": "Classes", "description": "Notable classes.", "rationale": "Sources.", "layers": [ { "id": "examples", "name": "Examples", "description": "Examples.", "findings": [ { "id": "examples-finding", "name": "Examples", "description": "Examples.", "questions": [ { "text": "What were the kkStB 4.0, NZR B and E classes, the CGR Fairlie 0-6-6-0, CCFPP 1 and 2 and OSE class Z?", "kind": "provenance" }, { "text": "Which entry fits the specific class?", "kind": "action" } ] } ] }, { "id": "articulated", "name": "Articulated", "description": "Articulated tanks.", "findings": [ { "id": "articulated-finding", "name": "Articulated", "description": "Articulated.", "questions": [ { "text": "How did Fairlie, Garratt and Mallet tank designs work?", "kind": "provenance" }, { "text": "Which references are standard?", "kind": "provenance" } ] } ] } ] }, { "id": "preserve", "name": "Preserve", "description": "Preservation.", "rationale": "Practice.", "layers": [ { "id": "heritage", "name": "Heritage", "description": "Heritage railways.", "findings": [ { "id": "heritage-finding", "name": "Heritage", "description": "Heritage.", "questions": [ { "text": "Where are tank locomotives preserved and operated?", "kind": "provenance" }, { "text": "Which sources are cited?", "kind": "provenance" } ] } ] }, { "id": "operation", "name": "Operation", "description": "Operation and safety.", "findings": [ { "id": "operation-finding", "name": "Operation", "description": "Operation.", "questions": [ { "text": "How are preserved tank locomotives maintained and inspected?", "kind": "provenance" }, { "text": "Which entry fits heritage railway?", "kind": "action" } ] } ] } ] }, { "id": "context", "name": "Context", "description": "History and culture.", "rationale": "Context.", "layers": [ { "id": "history", "name": "History", "description": "History.", "findings": [ { "id": "history-finding", "name": "History", "description": "History.", "questions": [ { "text": "How did tank locomotives develop from early designs to their decline with dieselisation?", "kind": "provenance" }, { "text": "Which entry fits the history of steam locomotives?", "kind": "action" } ] } ] }, { "id": "culture", "name": "Culture", "description": "Culture.", "findings": [ { "id": "culture-finding", "name": "Culture", "description": "Culture.", "questions": [ { "text": "How do tank locomotives appear in culture, such as Thomas the Tank Engine?", "kind": "provenance" }, { "text": "Which entry fits Thomas the Tank Engine?", "kind": "action" } ] } ] } ] } ] }, "openQuestions": [ "Should saddle tank and Fairlie locomotive be separate primary entries?", "How should railway history sources be linked?", "The registry entry has merged aliases naming specific classes; should they be split off?" ], "statistics": { "bundles": 4, "layers": 8, "findings": 8, "questions": 16 } }