{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.piano","code":"thing-q5994","url":"https://ver.cy/models/thing/q5994/","name":"piano","alternateNames":["street piano","organised piano","Nickelodeon","claviola","electronic piano","player piano","grand piano","luthéal","digital player piano","reproducing piano","magnetic resonator piano","Doppio Borgato"],"kind":"thing","status":"published","version":"0.2.0-wave.3","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 piano is a keyboard musical instrument whose acoustic forms produce sound through hammers striking strings whose vibration is amplified by a soundboard, while electronic and digital forms reproduce piano sound electronically; the acoustic piano was invented by Bartolomeo Cristofori around 1700 and developed into grand and upright forms, with mechanical variants including player pianos and piano-based coin-operated instruments, while orchestrions are mechanical orchestral instruments that may incorporate a piano but are not generally piano variants; the piano is central to Western classical, jazz and popular music, and street pianos bring it into public spaces.","purpose":"Let an agent explain the piano and its mechanism, relay types, history and repertoire from music sources, describe mechanical, electronic and public variants, and distinguish the piano from the harpsichord, organ, keyboard synthesiser and celesta.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["Acoustic pianos use hammers to strike strings, while electronic and digital pianos reproduce piano sound electronically.","Pianos offer dynamic range.","Pianos have a wide repertoire.","Grand and upright forms are characteristic acoustic piano designs."],"structure":{"bundles":[{"id":"understand","name":"Understand","description":"What a piano is.","layers":[{"id":"definition","name":"Definition","description":"Definition and mechanism.","findings":[{"id":"definition-finding","name":"Definition","description":"Definition.","questions":[{"text":"What is a piano, and how do the action, strings, soundboard and pedals work?","kind":"definition"},{"text":"Is the question about the piano, a variant or another keyboard instrument?","kind":"boundary"}]}]},{"id":"types","name":"Types","description":"Types.","findings":[{"id":"types-finding","name":"Types","description":"Types.","questions":[{"text":"How do grand, upright, player, nickelodeon, organised, claviola, electronic and digital pianos differ?","kind":"definition"},{"text":"Which entry fits the specific type?","kind":"action"}]}]}]},{"id":"play","name":"Play","description":"Playing and learning.","layers":[{"id":"learning","name":"Learning","description":"Learning.","findings":[{"id":"learning-finding","name":"Learning","description":"Learning.","questions":[{"text":"How do people learn piano, and what methods and grades exist?","kind":"action"},{"text":"Which references are standard?","kind":"provenance"}]}]},{"id":"repertoire","name":"Repertoire","description":"Repertoire.","findings":[{"id":"repertoire-finding","name":"Repertoire","description":"Repertoire.","questions":[{"text":"What are the major piano repertoires in classical, jazz and popular music?","kind":"provenance"},{"text":"Which sources are cited?","kind":"provenance"}]}]}]},{"id":"make","name":"Make","description":"Making and care.","layers":[{"id":"manufacture","name":"Manufacture","description":"Manufacture.","findings":[{"id":"manufacture-finding","name":"Manufacture","description":"Manufacture.","questions":[{"text":"How are pianos made, and who are the major makers?","kind":"provenance"},{"text":"Which entry fits the specific maker?","kind":"action"}]}]},{"id":"care","name":"Care","description":"Tuning and care.","findings":[{"id":"care-finding","name":"Care","description":"Care.","questions":[{"text":"How are pianos tuned, regulated and maintained?","kind":"action"},{"text":"Which entry fits piano tuning?","kind":"action"}]}]}]},{"id":"context","name":"Context","description":"History and culture.","layers":[{"id":"history","name":"History","description":"History.","findings":[{"id":"history-finding","name":"History","description":"History.","questions":[{"text":"How did the piano develop from Cristofori through the fortepiano to the modern instrument and its mechanical and electronic descendants?","kind":"provenance"},{"text":"Which entry fits the history of the piano?","kind":"action"}]}]},{"id":"culture","name":"Culture","description":"Culture.","findings":[{"id":"culture-finding","name":"Culture","description":"Culture.","questions":[{"text":"What roles do pianos play in homes, concert halls, public spaces such as street pianos and popular culture?","kind":"provenance"},{"text":"Which entry fits street piano?","kind":"action"}]}]}]}]},"agentConduct":{"may":["Describe the piano, its history and its mechanical variants.","Monitor room humidity and temperature for a piano's owner and suggest tuning when needed."],"mustNot":["Move a piano without enough people and equipment for its weight.","Place a piano where it can tip or fall onto people, especially children.","Expose a piano to heat, damp or direct sun that damages it.","Dispose of an old or historic piano without the owner's decision."],"requiresHuman":["Selling, donating or scrapping a piano."]},"ethics":{"considerations":["Pianos are heavy, and moving them causes serious injuries.","Old instruments carry family memories and craft heritage."],"affectedParties":["Movers","Children near pianos","Owners and players"]},"owners":{"steward":"The person who owns it.","roles":[],"masterSystems":[]},"relations":[{"target":"Q52954","type":"parent","note":"registry parent class"},{"target":"keyboard instrument","type":"related","note":"in registry terms"},{"target":"Bartolomeo Cristofori","type":"related","note":"around 1700"},{"target":"harpsichord","type":"related","note":"which plucks strings"},{"target":"piano music","type":"related","note":"across genres"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.piano","Wikidata: Q5994 (https://www.wikidata.org/wiki/Q5994)"]},"properties":{"applicability":"required","items":["keys: 88 count - standard","strings: about 230 count","invented: about 1700 year - Cristofori","concert grand length: about 2.7-3 m"]},"recognition":{"applicability":"required","items":["An acoustic piano is a keyboard instrument with hammer-struck strings.","Forms and uses include grand and upright pianos, player pianos, nickelodeons, organised pianos, electronic and digital pianos, and street pianos.","The harpsichord plucks strings, the organ uses pipes or reeds, and synthesisers generate sound electronically.","A large instrument with a keyboard of black and white keys, in grand or upright form."]},"capabilities":{"applicability":"required","items":["explain mechanism and types","relay history and repertoire","describe variants","distinguish from other keyboards"]},"hazards":{"applicability":"required","items":["Tuning instability with humidity","Confusing pianos with other keyboards","Heavy moving hazards"]},"interfaces":{"applicability":"required","items":["Concert pitch standards such as A440","Ivory trade bans affecting antique keys","Safety and moving regulations"]},"context":{"applicability":"required","items":["Making music.","grand pianos","upright pianos","player pianos and reproducing pianos","coin-operated nickelodeons and orchestrions or organised pianos","electronic and digital pianos","street and public pianos","historical fortepianos and hybrids such as the claviola"]}},"sources":[{"title":"Wikidata item Q5994: piano","url":"https://www.wikidata.org/wiki/Q5994","note":"identity and sense of the item"},{"title":"Wikipedia: Piano","url":"https://en.wikipedia.org/wiki/Piano","note":"general description of the item"}],"openQuestions":["Should grand piano, player piano and digital piano be separate primary entries?","How should music sources be linked?","The registry entry has merged aliases naming variants and public installations; should they be split off?"],"resources":{"spec":"/models/things/publications/thing-q5994/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q5994/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-13T06:38:56Z","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 2026-10-07T12:16:33+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass"},"score":1.0}}