{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.proscenium","code":"thing-q385348","url":"https://ver.cy/models/thing/q385348/","name":"proscenium","alternateNames":[],"kind":"thing","status":"research-draft","version":"0.2.0-wave.3","language":"en","classifiers":{"family":"Thing Registry","category":"Physical world and living systems","entryKind":"thing","plane":"PHY","domain":["PHY.BLT"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"The part of a theatre stage in front of the curtain, and the arch or frame that separates the stage from the auditorium, through which the audience views the performance as through a picture frame; the proscenium arch defines the proscenium theatre form dominant since the seventeenth century, houses the curtain and lighting positions, and contrasts with thrust, arena and black box configurations.","purpose":"Let an agent explain the proscenium and the proscenium arch, their role in theatre design and staging, relay history and examples, and distinguish the proscenium form from other stage configurations.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["Picture-frame viewing","Curtain line","Defines a theatre type","Baroque origin"],"structure":{"bundles":[{"id":"understand","name":"Understand","description":"What a proscenium is.","layers":[{"id":"definition","name":"Definition","description":"Definition and parts.","findings":[{"id":"definition-finding","name":"Definition","description":"Definition.","questions":[{"text":"What is the proscenium, and how do the arch, curtain and apron relate?","kind":"definition"},{"text":"Is the question about the proscenium, the apron or the whole stage?","kind":"boundary"}]}]},{"id":"configurations","name":"Configurations","description":"Stage configurations.","findings":[{"id":"configurations-finding","name":"Configurations","description":"Configurations.","questions":[{"text":"How does the proscenium form differ from thrust, arena and black box stages?","kind":"definition"},{"text":"Which entry fits the specific configuration?","kind":"action"}]}]}]},{"id":"design","name":"Design","description":"Design and safety.","layers":[{"id":"design","name":"Design","description":"Design.","findings":[{"id":"design-finding","name":"Design","description":"Design.","questions":[{"text":"How are proscenium openings sized and equipped for sightlines, lighting and scenery?","kind":"provenance"},{"text":"Which entry fits theatre architecture?","kind":"action"}]}]},{"id":"safety","name":"Safety","description":"Safety.","findings":[{"id":"safety-finding","name":"Safety","description":"Safety.","questions":[{"text":"What fire and safety rules apply at the proscenium, such as safety curtains?","kind":"provenance"},{"text":"Which references are standard?","kind":"provenance"}]}]}]},{"id":"history","name":"History","description":"History.","layers":[{"id":"origins","name":"Origins","description":"Origins.","findings":[{"id":"origins-finding","name":"Origins","description":"Origins.","questions":[{"text":"How did the proscenium arch develop in Renaissance and baroque Italy?","kind":"provenance"},{"text":"Which entry fits the history of theatre?","kind":"action"}]}]},{"id":"examples","name":"Examples","description":"Notable examples.","findings":[{"id":"examples-finding","name":"Examples","description":"Examples.","questions":[{"text":"Which theatres have notable prosceniums?","kind":"provenance"},{"text":"Which entry fits the specific theatre?","kind":"action"}]}]}]},{"id":"practice","name":"Practice","description":"Staging and debate.","layers":[{"id":"staging","name":"Staging","description":"Staging.","findings":[{"id":"staging-finding","name":"Staging","description":"Staging.","questions":[{"text":"How does the proscenium shape staging, illusion and the fourth wall?","kind":"provenance"},{"text":"Which entry fits fourth wall?","kind":"action"}]}]},{"id":"debate","name":"Debate","description":"Debates.","findings":[{"id":"debate-finding","name":"Debate","description":"Debate.","questions":[{"text":"What debates exist about proscenium versus open staging, with positions attributed?","kind":"provenance"},{"text":"Is the presentation neutral?","kind":"boundary"}]}]}]}]},"agentConduct":{"may":["explain the element and its role","relay history and examples","distinguish stage configurations","relay design considerations"],"mustNot":[],"requiresHuman":[]},"ethics":{"considerations":[],"affectedParties":[]},"owners":{"steward":"","roles":[],"masterSystems":[]},"relations":[{"target":"Q811979","type":"parent","note":"registry parent class"},{"target":"built structure","type":"related","note":"in registry terms"},{"target":"stage","type":"related","note":"the front frame"},{"target":"proscenium theatre","type":"related","note":"the theatre type"},{"target":"thrust stage","type":"related","note":"without a frame"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.proscenium","Wikidata: Q385348 (https://www.wikidata.org/wiki/Q385348)"]},"properties":{"applicability":"required","items":[]},"recognition":{"applicability":"required","items":["Frame between stage and auditorium","Curtain and forestage associated","Thrust and arena stages extend into the audience without a frame","A large rectangular or arched opening framing the stage, often decorated, with the curtain hung behind it."]},"capabilities":{"applicability":"required","items":["explain the element and its role","relay history and examples","distinguish stage configurations","relay design considerations"]},"hazards":{"applicability":"required","items":["Sightline restrictions","Fire risk at the stage opening, addressed by safety curtains","Confusing proscenium with apron or curtain"]},"interfaces":{"applicability":"required","items":["Building and fire safety codes for theatres, including safety curtains","Stage machinery standards"]},"context":{"applicability":"required","items":["Framing the stage for the audience.","proscenium arches of baroque and nineteenth-century theatres","modern proscenium stages with fly towers","the forestage or apron in front of the arch","adjustable prosceniums","proscenium theatres as a building type"]}},"sources":[],"openQuestions":["Should proscenium theatre be a separate entry?","How should theatre design references be linked?","How should historical prosceniums be recorded?","Which entry fits the specific configuration?","Which entry fits theatre architecture?","Which entry fits the history of theatre?"],"resources":{"spec":"/models/things/publications/thing-q385348/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q385348/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-12T23:27:52Z","builder":"tools/build_cards.py@1.0.0"},"completeness":{"sections":{"classifiers":"filled","whatItIs":"filled","purpose":"filled","distinguishingFeatures":"filled","structure":"filled","agentConduct":"derived","ethics":"missing","owners":"missing","relations":"filled","interaction.identity":"filled","interaction.properties":"missing","interaction.recognition":"filled","interaction.capabilities":"filled","interaction.hazards":"filled","interaction.interfaces":"filled","interaction.context":"filled","sources":"missing"},"notes":{"agentConduct":"Affordances listed as what may be done; prohibitions collected from the text.","sources":"Written from model knowledge without web access; claims are unverified."},"score":0.735}}