{ "model": { "rank": 1212, "code": "thing-q1344", "model_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.", "family": "Thing Registry", "category": "Information and virtual systems", "status": "research-draft", "kind": "thing", "plane": "INF", "domain": "INF.MED", "industry": "", "version": "", "url": "/models/thing/q1344/", "tier": 2, "score": 168, "payload": { "layer": "wikidata", "aliases": [ "tragedia lirica", "tragédie en musique", "lost opera", "pastoral opera", "television opera", "opéra-ballet", "Zhengzi opera", "biographical opera", "Hungarian opera", "fur hat opera", "ballad opera", "drame lyrique", "dramma giocoso", "one-act opera", "comic opera", "opera based on work by this person", "fairy-tale opera", "favola in musica", "radio opera", "zarzuela", "children's opera", "serenata", "Literaturoper", "Finnish opera", "opera buffa", "opera seria", "contemporary opera", "monodrama", "Ukrainian opera", "Russian opera", "Baroque opera", "Dramma per musica", "singspiel", "grande opera", "verismo", "Romantische Oper", "German opera", "American Indian opera", "Armenian opera", "Chinese-language Western-style opera" ], "aliasCount": 64, "merged": 64, "knownIn": 168, "facets": null, "markers": [], "lexicalClass": "", "senseRank": null, "alsoRegisteredAs": null, "source": { "dataset": "wikidata", "item": "Q1344", "url": "https://www.wikidata.org/wiki/Q1344", "license": "CC0 1.0" } }, "research": { "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" }, "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": [] }, "sources": [], "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 } }, "draft": { "generator": "vr.draft.v3", "status": "draft-generated", "researched": false, "archetype": "work, medium or creative form", "method": "Written from the archetype playbook - what this kind of thing needs beyond identity and provenance - and from the structure that recurred across 6,333 models already researched by two engines. Applied to this entry by rule. No source was read for this thing and no claim here is researched. This entry carries no facets of its own, so they were inferred from its domain - a guess about a whole domain applied to one thing.", "facetsInferred": true, "nextPass": "A researcher replaces this draft with a sourced specification. Treat every sentence below as a proposal to argue with.", "purpose": "Give an agent a durable, checkable way to recognise a opera, record what state it is in, and decide what may be done with it.", "whatItIs": "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.", "characteristics": { "substance": "information", "origin": "conceptual", "agency": "inert" }, "whatYouCanDoWithIt": [ "read and interpreted", "observed and measured" ], "distinguishingFeatures": [ "Names folded into this entry, which a task may need to split apart again: tragedia lirica, tragédie en musique, lost opera, pastoral opera, television opera, opéra-ballet, Zhengzi opera, biographical opera, Hungarian opera, fur hat opera, ballad opera, drame lyrique.", "64 finer distinctions are held as aliases rather than separate entries, because telling them apart needs a task that asks for it.", "Described in 168 Wikipedia languages, which is a measure of how widely the thing is known, not of how important it is." ], "openQuestionsForResearch": [ "Which of the bundles below does a real task actually need, and which are ceremony?", "What does this thing have that the facets do not capture at all?", "Which neighbouring kind is most often confused with a opera, and on what evidence are they told apart?" ], "whatItIsMadeOf": "content that has to be carried by something else", "physicalCharacter": [ "Does nothing on its own; everything it does, something else did to it.", "These come from the domain this entry sits in rather than from the entry itself, so treat them as a first guess about the whole domain applied to one thing." ], "whatCanBeDoneWithIt": [ "read it and act on what it says", "observe it, measure it, record its state" ], "howItIsRecognised": [ "What is seen is a copy or a performance, not the work. Recognising the work means recognising the content through whatever is carrying it." ], "relatedModels": [ { "relation": "covers", "note": "Finer kinds folded into this entry because telling them apart needs a task that asks for it. Each is a model waiting to be split out when one does.", "targets": [ "tragedia lirica", "tragédie en musique", "lost opera", "pastoral opera", "television opera", "opéra-ballet", "Zhengzi opera", "biographical opera", "Hungarian opera", "fur hat opera", "ballad opera", "drame lyrique" ] } ], "standing": "Described in 168 Wikipedia languages, which measures how widely it is written about rather than how important or how common it is. 64 finer distinctions are held inside this entry as names rather than as separate models.", "structure": { "bundles": [ { "id": "identity-and-classification", "name": "Identity, naming and classification", "description": "How an agent tells one opera from another, and a opera from things that resemble it.", "rationale": "Recognition comes before every other claim. Without stable identity nothing else in the model can be trusted to be about the same thing twice.", "layers": [ { "id": "naming-and-identifiers", "name": "Names and identifiers", "description": "The names this thing goes by and the identifiers that survive translation and time.", "findings": [ { "id": "preferred-name-and-aliases", "name": "Preferred name, aliases and local names", "description": "Which name to use, which names mean the same thing, and which merely sound similar.", "questions": [ { "id": "preferred-name-and-aliases-q01", "text": "What identifies and describes the name of a opera, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "preferred-name-and-aliases-q02", "text": "Who or what asserted this about the name of a opera, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "preferred-name-and-aliases-q03", "text": "What may an agent decide or do once the name of a opera is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] }, { "id": "stable-identifiers", "name": "Stable identifiers and external keys", "description": "Identifiers that keep pointing at this kind of thing across systems and languages.", "questions": [ { "id": "stable-identifiers-q01", "text": "What identifies and describes an identifier for a opera, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "stable-identifiers-q02", "text": "Who or what asserted this about an identifier for a opera, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "stable-identifiers-q03", "text": "What may an agent decide or do once an identifier for a opera is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "classification-and-granularity", "name": "Classification and granularity", "description": "Where a opera sits among kinds, and how finely a task needs to cut it.", "findings": [ { "id": "kind-and-parents", "name": "Kind, parents and neighbouring kinds", "description": "The classes this thing belongs to and the ones it is next to.", "questions": [ { "id": "kind-and-parents-q01", "text": "What identifies and describes the kind of a opera, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "kind-and-parents-q02", "text": "Who or what asserted this about the kind of a opera, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "kind-and-parents-q03", "text": "What may an agent decide or do once the kind of a opera is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] }, { "id": "distinguishing-features", "name": "Distinguishing features", "description": "What separates a opera from the things most often confused with it.", "questions": [ { "id": "distinguishing-features-q01", "text": "What identifies and describes what distinguishes a opera, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "distinguishing-features-q02", "text": "Who or what asserted this about what distinguishes a opera, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "distinguishing-features-q03", "text": "What may an agent decide or do once what distinguishes a opera is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] }, { "id": "state-and-lifecycle", "name": "State and lifecycle", "description": "The states a opera passes through and the events that move it between them.", "rationale": "Most decisions about a thing depend on what state it is in now, which is a claim with a time on it, not a property.", "layers": [ { "id": "lifecycle-stages", "name": "Lifecycle stages", "description": "From coming into existence to ceasing to be one of these.", "findings": [ { "id": "stages-and-transitions", "name": "Stages and transitions", "description": "The stages worth naming and what moves a opera between them.", "questions": [ { "id": "stages-and-transitions-q01", "text": "What identifies and describes the lifecycle of a opera, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "stages-and-transitions-q02", "text": "Who or what asserted this about the lifecycle of a opera, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "stages-and-transitions-q03", "text": "What may an agent decide or do once the lifecycle of a opera is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "observations-and-status", "name": "Observations and current status", "description": "What is observed about a opera, how often and by whom.", "findings": [ { "id": "observation-record", "name": "Observation record", "description": "How an observation of a opera is recorded so that it can be superseded rather than overwritten.", "questions": [ { "id": "observation-record-q01", "text": "What identifies and describes an observation of a opera, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "observation-record-q02", "text": "Who or what asserted this about an observation of a opera, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "observation-record-q03", "text": "What may an agent decide or do once an observation of a opera is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] }, { "id": "content-and-access", "name": "Content, encoding and access", "description": "What a opera says, how it is encoded and who may read it.", "rationale": "An informational thing carries content that can be copied, versioned and withheld, none of which its physical carrier explains.", "layers": [ { "id": "content-and-encoding", "name": "Content and encoding", "description": "The content itself, its format and its language.", "findings": [ { "id": "content-and-format", "name": "Content, format and language", "description": "What a opera contains and in what form it is held.", "questions": [ { "id": "content-and-format-q01", "text": "What identifies and describes the content of a opera, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "content-and-format-q02", "text": "Who or what asserted this about the content of a opera, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "content-and-format-q03", "text": "What may an agent decide or do once the content of a opera is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "access-and-rights", "name": "Access, rights and retention", "description": "Who may read, copy or change it, and for how long it is kept.", "findings": [ { "id": "access-rules", "name": "Access rules and retention", "description": "The permissions attached to a opera and the period it survives.", "questions": [ { "id": "access-rules-q01", "text": "What identifies and describes access to a opera, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "access-rules-q02", "text": "Who or what asserted this about access to a opera, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "access-rules-q03", "text": "What may an agent decide or do once access to a opera is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] }, { "id": "work-and-manifestation", "name": "Work, version and copy", "description": "Which level of opera a statement is about.", "rationale": "The work, the edition, the file and the copy in hand are four things; rights and content attach to different ones.", "layers": [ { "id": "levels", "name": "Levels of the thing", "description": "Work, expression, manifestation and item, in plain terms.", "findings": [ { "id": "level-rules", "name": "What belongs at each level", "description": "Which facts hold for the work and which only for one copy.", "questions": [ { "id": "level-rules-q01", "text": "For opera, which facts belong to the work itself, which to a version, and which to a single copy?", "kind": "boundary" }, { "id": "level-rules-q02", "text": "What identifier exists at each level, and which one is being cited?", "kind": "definition" } ] } ] }, { "id": "versions", "name": "Versions, editions and variants", "description": "How versions differ and which is canonical to whom.", "findings": [ { "id": "version-record", "name": "Versions and canonicity", "description": "Differences that matter and who calls one authoritative.", "questions": [ { "id": "version-record-q01", "text": "Which versions or editions of opera exist, and how do they differ substantively?", "kind": "definition" }, { "id": "version-record-q02", "text": "Who treats which version as authoritative, and for what purpose?", "kind": "provenance" } ] } ] } ] }, { "id": "authorship-and-rights", "name": "Authorship, rights and permitted use", "description": "Who made opera and what may be done with it.", "rationale": "Rights are jurisdictional, time-limited and attached to a level, and an agent that ignores that will copy what it may not.", "layers": [ { "id": "authorship", "name": "Authorship and contribution", "description": "Who contributed what, and in what capacity.", "findings": [ { "id": "contribution-record", "name": "Contributors and roles", "description": "The people and bodies behind it, with their roles.", "questions": [ { "id": "contribution-record-q01", "text": "Who authored or contributed to opera, in what roles, and how is that attested?", "kind": "provenance" }, { "id": "contribution-record-q02", "text": "Where authorship is disputed or anonymous, what is recorded instead?", "kind": "boundary" } ] } ] }, { "id": "rights", "name": "Rights and permissions", "description": "Which rights subsist, where, until when, and what they permit.", "findings": [ { "id": "rights-record", "name": "Rights, term and permitted acts", "description": "The regime in force and what it allows.", "questions": [ { "id": "rights-record-q01", "text": "What rights subsist in opera, in which jurisdictions, and until when?", "kind": "definition" }, { "id": "rights-record-q02", "text": "Which acts are permitted without further permission, and which must an agent refuse?", "kind": "action" } ] } ] } ] }, { "id": "provenance-and-evidence", "name": "Provenance, evidence and time", "description": "Where every claim about a opera came from and when it held.", "rationale": "A claim without a source and a time cannot be superseded, only overwritten, and an agent that overwrites loses the ability to explain itself.", "layers": [ { "id": "source-and-authority", "name": "Source and authority", "description": "Who said it, on what evidence, and how strongly.", "findings": [ { "id": "claim-provenance", "name": "Claim provenance and confidence", "description": "The authority behind each claim about a opera and how confident it is.", "questions": [ { "id": "claim-provenance-q01", "text": "What identifies and describes a claim about a opera, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "claim-provenance-q02", "text": "Who or what asserted this about a claim about a opera, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "claim-provenance-q03", "text": "What may an agent decide or do once a claim about a opera is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "time-and-versions", "name": "Time, versions and supersession", "description": "When a claim was true, when it was learnt, and what replaced it.", "findings": [ { "id": "validity-and-supersession", "name": "Validity period and supersession", "description": "How an old claim about a opera is retired without being erased.", "questions": [ { "id": "validity-and-supersession-q01", "text": "What identifies and describes the validity of a claim about a opera, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "validity-and-supersession-q02", "text": "Who or what asserted this about the validity of a claim about a opera, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "validity-and-supersession-q03", "text": "What may an agent decide or do once the validity of a claim about a opera is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] } ] }, "statistics": { "bundles": 6, "layers": 12, "findings": 14, "questions": 38 } } } }