{
  "vercy": "1.0-draft",
  "publication": {
    "status": "research-draft",
    "adjudicationStatus": "unreviewed",
    "publishableCanonical": false,
    "generatedAt": "2026-09-11T21:52:35Z",
    "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": 2,
    "engine": "claude",
    "enrichment": {
      "pass": 3,
      "engine": "claude",
      "producedAt": "2026-10-05T23:50:00Z",
      "ingestedAt": "2026-10-05T20:44:25+00:00",
      "fields": [
        "agent_conduct",
        "ethics",
        "owners"
      ]
    },
    "gate": {
      "passed": true,
      "version": "1.0",
      "at": "2026-10-06T19:51:54+00:00",
      "evidence": [
        "completeness 1.00",
        "sense: Wikidata description",
        "2 live sources",
        "review by codex: pass"
      ]
    }
  },
  "metaModel": {
    "id": "THING-Q1344",
    "registryId": "vr.tr.opera",
    "name": "opera",
    "version": "0.2.0-wave.2",
    "entryKind": "thing",
    "family": "Thing Registry",
    "domain": [
      "INF.MED"
    ],
    "status": "research-draft"
  },
  "canonicalUrl": "https://ver.cy/models/thing/q1344/",
  "model": {
    "registry_id": "vr.tr.opera",
    "name": "opera",
    "purpose": "Let an agent explain opera and its forms, describe specific works and composers with sources, support attending and learning about opera, and describe opera institutions and history.",
    "definition": "A dramatic work in which singers and musicians perform a story combining music, text, staging and often dance, developed in Italy around 1600 and spread worldwide in forms such as opera seria, opera buffa, tragedie en musique, opera-ballet, grand opera, verismo and contemporary and television opera; opera is performed in opera houses and festivals and is a major part of Western and global musical culture.",
    "what_it_is_for": "Sung dramatic works.",
    "affordances": [
      "explain opera forms and terms",
      "describe specific works and composers",
      "support attending and learning",
      "describe institutions and history"
    ],
    "distinguishing_features": [
      "Sung throughout or mostly",
      "Dramatic",
      "Orchestral",
      "Institutionalised"
    ],
    "appearance": "Staged performances with singers, orchestra, sets and costumes.",
    "visual_identification": [
      "Sung drama with orchestra",
      "Staged",
      "Musicals use spoken dialogue and different vocal styles; oratorios are unstaged"
    ],
    "physical_properties": [],
    "families_and_kinds": [
      "opera seria and opera buffa",
      "French forms such as tragedie en musique and opera-ballet",
      "grand opera and music drama",
      "verismo and twentieth century opera",
      "contemporary, chamber and television opera"
    ],
    "related_models": [
      {
        "relation": "is a kind of",
        "target": "musical drama",
        "why": "category"
      },
      {
        "relation": "is a kind of",
        "target": "composed musical work",
        "why": "category"
      },
      {
        "relation": "is related to",
        "target": "ballet",
        "why": "often combined"
      },
      {
        "relation": "is related to",
        "target": "stylistic device",
        "why": "libretto techniques"
      }
    ],
    "identifiers": [],
    "standards_and_regulation": [
      "Copyright on works and performances",
      "Theatre safety regulations",
      "Public funding rules for opera houses"
    ],
    "failure_modes_and_hazards": [
      "Confusing opera with musicals",
      "Misattributing works",
      "Inaccessible presentation for newcomers"
    ],
    "in_scope": [],
    "out_of_scope": [],
    "characteristics": [],
    "agent_conduct": {
      "may": [
        "Describe an opera's composer, librettist, premiere and plot from reliable sources.",
        "Help audiences find performances, recordings and surtitles."
      ],
      "must_not": [
        "Distribute recordings or scores of a production without the rights holders' permission.",
        "Misattribute a work, aria or libretto to the wrong composer or writer.",
        "Present a staging's changes as the original text or music of the work.",
        "Reproduce stereotyped portrayals from a work without noting their history."
      ],
      "requires_human": [
        "Commissioning edits or cuts to a work for a production."
      ]
    },
    "ethics": {
      "considerations": [
        "Many operas carry racial, colonial or gender stereotypes that productions must handle with care.",
        "Performers depend on fair credit and pay for their work in live and recorded forms."
      ],
      "affected_parties": [
        "Singers and musicians",
        "Composers, librettists and their heirs",
        "Audiences"
      ]
    },
    "owners": {
      "steward": "The composer or rights holder for the work; the opera company for each production.",
      "master_systems": []
    }
  },
  "sources": [
    {
      "id": "wikidata",
      "title": "Wikidata item Q1344: opera",
      "url": "https://www.wikidata.org/wiki/Q1344",
      "url_status": "live",
      "what_it_supports": "identity and sense of the item",
      "checked_by": "wikidata-api"
    },
    {
      "id": "wikipedia-en",
      "title": "Wikipedia: Opera",
      "url": "https://en.wikipedia.org/wiki/Opera",
      "url_status": "live",
      "what_it_supports": "general description of the item",
      "checked_by": "wikidata-api sitelink"
    }
  ],
  "structure": {
    "bundles": [
      {
        "id": "discover",
        "name": "Discover",
        "description": "Exploring opera.",
        "rationale": "Newcomers.",
        "layers": [
          {
            "id": "start",
            "name": "Start",
            "description": "Where to start.",
            "findings": [
              {
                "id": "start-finding",
                "name": "Start",
                "description": "Getting started.",
                "questions": [
                  {
                    "text": "Which operas suit a newcomer, and how can they be watched or heard?",
                    "kind": "action"
                  },
                  {
                    "text": "What happens at an opera performance, and what etiquette applies?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          },
          {
            "id": "work",
            "name": "Work",
            "description": "A specific opera.",
            "findings": [
              {
                "id": "work-finding",
                "name": "Work",
                "description": "Specific opera.",
                "questions": [
                  {
                    "text": "What is this opera about, who composed it and wrote the libretto, and when was it premiered, according to sources?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits it?",
                    "kind": "action"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "forms",
        "name": "Forms",
        "description": "Kinds of opera.",
        "rationale": "Genres.",
        "layers": [
          {
            "id": "genres",
            "name": "Genres",
            "description": "Opera genres.",
            "findings": [
              {
                "id": "genres-finding",
                "name": "Genres",
                "description": "Genres.",
                "questions": [
                  {
                    "text": "What are opera seria, opera buffa, tragedie en musique, opera-ballet, grand opera and verismo?",
                    "kind": "definition"
                  },
                  {
                    "text": "How does opera differ from musical theatre and oratorio?",
                    "kind": "definition"
                  }
                ]
              }
            ]
          },
          {
            "id": "terms",
            "name": "Terms",
            "description": "Opera terms.",
            "findings": [
              {
                "id": "terms-finding",
                "name": "Terms",
                "description": "Terms.",
                "questions": [
                  {
                    "text": "What do terms such as aria, recitative, libretto, leitmotif and voice types mean?",
                    "kind": "definition"
                  },
                  {
                    "text": "Which entry fits a voice type?",
                    "kind": "action"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "attend",
        "name": "Attend",
        "description": "Going to the opera.",
        "rationale": "Practical.",
        "layers": [
          {
            "id": "tickets",
            "name": "Tickets",
            "description": "Tickets and venues.",
            "findings": [
              {
                "id": "tickets-finding",
                "name": "Tickets",
                "description": "Tickets.",
                "questions": [
                  {
                    "text": "Which opera houses and festivals are nearby, and how are affordable tickets found?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Are performances streamed?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          },
          {
            "id": "institutions",
            "name": "Institutions",
            "description": "Opera institutions.",
            "findings": [
              {
                "id": "institutions-finding",
                "name": "Institutions",
                "description": "Institutions.",
                "questions": [
                  {
                    "text": "How are opera houses organised and funded, and what debates surround public subsidy, with positions attributed?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits a specific house?",
                    "kind": "action"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "history",
        "name": "History",
        "description": "History and world opera.",
        "rationale": "Context.",
        "layers": [
          {
            "id": "history",
            "name": "History",
            "description": "History of opera.",
            "findings": [
              {
                "id": "history-finding",
                "name": "History",
                "description": "History.",
                "questions": [
                  {
                    "text": "How did opera develop from Florentine beginnings through its national traditions to today?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which composers and works are landmarks?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          },
          {
            "id": "global",
            "name": "Global",
            "description": "Opera beyond Europe.",
            "findings": [
              {
                "id": "global-finding",
                "name": "Global",
                "description": "Global opera.",
                "questions": [
                  {
                    "text": "How has opera developed outside Europe, and how do Chinese opera and other sung dramas relate?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which lost operas are known only from records?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          }
        ]
      }
    ]
  },
  "openQuestions": [
    "Should each opera be a separate entry?",
    "How should performance databases be linked?",
    "How should libretti be linked?"
  ],
  "statistics": {
    "bundles": 4,
    "layers": 8,
    "findings": 8,
    "questions": 16
  }
}