{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.currency","code":"thing-q8142","url":"https://ver.cy/models/thing/q8142/","name":"currency","alternateNames":["ERC-20","dinar","fals","bawbee","siege money","Sycee","Dajōkan-satsu","gold dinar","modern gold dinar","ducat","Offa's imitation dinar","Cekin"],"kind":"thing","status":"published","version":"0.2.0-wave.1","language":"en","classifiers":{"family":"Thing Registry","category":"Cross-cutting context","entryKind":"thing","plane":"XCT","domain":["XCT.QLT"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"A generally accepted medium of exchange for goods or services within a country, area or community, including historical and private currencies, which may have a standard code, subunits or an issuing authority but need not have all or any of these features.","purpose":"Let an agent handle currencies by code, issuer, status and subunits, and treat crypto tokens and historical currencies with their true status.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["A currency is a system of money rather than only its physical notes.","Some currencies are identified by ISO 4217 codes.","Some currencies have subunits such as fals or cents.","Currency status does not by itself establish legal-tender status."],"structure":{"bundles":[{"id":"identity","name":"Identity","description":"Which currency.","layers":[{"id":"code","name":"Code","description":"ISO 4217.","findings":[{"id":"code-finding","name":"Code","description":"Currency code.","questions":[{"text":"Which ISO 4217 code identifies this currency?","kind":"provenance"},{"text":"Could its symbol be confused with another?","kind":"boundary"}]}]},{"id":"status","name":"Status","description":"Current or historical.","findings":[{"id":"status-finding","name":"Status","description":"Current status.","questions":[{"text":"Is the currency current, and where?","kind":"boundary"},{"text":"What replaced it, if historical?","kind":"provenance"}]}]}]},{"id":"structure","name":"Structure","description":"Units and issuer.","layers":[{"id":"units","name":"Units","description":"Subunits.","findings":[{"id":"units-finding","name":"Subunits","description":"Subunits and minor units.","questions":[{"text":"What subunits does it have?","kind":"definition"},{"text":"How many decimal places are used?","kind":"measurement"}]}]},{"id":"issuer","name":"Issuer","description":"Central bank.","findings":[{"id":"issuer-finding","name":"Issuer","description":"The issuing authority.","questions":[{"text":"Who issues it?","kind":"provenance"},{"text":"Which monetary policy regime applies?","kind":"definition"}]}]}]},{"id":"exchange","name":"Exchange","description":"Converting it.","layers":[{"id":"rate","name":"Rate","description":"Exchange rate.","findings":[{"id":"rate-finding","name":"Rate","description":"Rate and source.","questions":[{"text":"What is the exchange rate, from which source and time?","kind":"provenance"},{"text":"Is the rate fixed or floating?","kind":"definition"}]}]},{"id":"controls","name":"Controls","description":"Capital controls.","findings":[{"id":"controls-finding","name":"Controls","description":"Restrictions.","questions":[{"text":"Are there exchange or capital controls?","kind":"boundary"},{"text":"Are there multiple official rates?","kind":"boundary"}]}]}]},{"id":"non-state","name":"Non-state and historical","description":"Other currencies.","layers":[{"id":"crypto","name":"Crypto-assets","description":"Tokens.","findings":[{"id":"crypto-finding","name":"Crypto status","description":"Legal status of tokens.","questions":[{"text":"What is the legal status of this token here?","kind":"boundary"},{"text":"Must an agent avoid giving investment advice about it?","kind":"boundary"}]}]},{"id":"historical","name":"Historical","description":"Old currencies.","findings":[{"id":"historical-finding","name":"History","description":"Historical context.","questions":[{"text":"When and where was it used?","kind":"provenance"},{"text":"Is it still redeemable?","kind":"boundary"}]}]}]}]},"agentConduct":{"may":["Convert amounts between currencies using a stated rate, source and time.","Identify a currency using its name, context and any available standard code or issuing authority rather than relying on an ambiguous symbol."],"mustNot":["Treat an ambiguous symbol such as the dollar sign as one currency without checking context.","Accept, quote or pay in a withdrawn currency as if it were still legal tender.","Present a private token or voucher as legal tender.","Assist in counterfeiting notes or coins."],"requiresHuman":["Making payments or exchanges in a currency on someone's behalf.","Choosing the currency for a contract or price that binds a person."]},"ethics":{"considerations":["Currency errors silently change what people pay or receive.","Currency policy affects savings and prices for whole populations, often the poorest most."],"affectedParties":["Payers and payees","Savers and holders of the currency","Traders and businesses"]},"owners":{"steward":"An issuing authority may oversee a currency where one exists; other currencies have different governance arrangements, and the public holds and uses them.","roles":[],"masterSystems":["Central bank records document circulation where applicable.","Other currencies may be documented in their own governance records or historical records."]},"relations":[{"target":"Q11105360","type":"parent","note":"registry parent class"},{"target":"Q1368","type":"parent","note":"registry parent class"},{"target":"Q47574","type":"parent","note":"registry parent class"},{"target":"Q65240001","type":"parent","note":"registry parent class"},{"target":"money","type":"related","note":"medium of exchange"},{"target":"physical money","type":"related","note":"notes and coins"},{"target":"central bank","type":"related","note":"issuer"},{"target":"crypto-asset","type":"related","note":"different legal status"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.currency","Wikidata: Q8142 (https://www.wikidata.org/wiki/Q8142)","ISO 4217 code: three letters and three digits for example EUR 978"]},"properties":{"applicability":"not-applicable","items":[]},"recognition":{"applicability":"optional","items":["Currency symbols such as EUR, USD or local signs","ISO 4217 codes","Historical currencies such as siege money or sycee are collectors items","The notes and coins of the currency, its symbol, and its code in accounts."]},"capabilities":{"applicability":"required","items":["price and pay in it","exchange it for other currencies","identify it, by ISO 4217 code","track its status, as current, historical or replaced"]},"hazards":{"applicability":"required","items":["Ambiguous symbols such as $ used by many currencies","Treating crypto tokens as legal tender","Using withdrawn currencies"]},"interfaces":{"applicability":"required","items":["ISO 4217","Central bank laws","EU MiCA regulation on crypto-assets"]},"context":{"applicability":"required","items":["Denominating prices, payments and accounts.","national currencies","currency unions such as the euro","historical currencies","emergency currencies such as siege money","crypto-assets and tokens"]}},"sources":[{"title":"Wikidata item Q8142: currency","url":"https://www.wikidata.org/wiki/Q8142","note":"identity and sense of the item"},{"title":"Wikipedia: Currency","url":"https://en.wikipedia.org/wiki/Currency","note":"general description of the item"}],"openQuestions":["Should currencies be instances with ISO codes?","How should historical currencies be linked to successors?","How should crypto-assets be classified?"],"resources":{"spec":"/models/things/publications/thing-q8142/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q8142/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-11T05:15:23Z","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":"not-applicable","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 2026-10-07T10:10:32+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass","interaction.properties":"Plane XCT: no invented physical properties."},"score":1.0}}