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Research draft

currency

vr.tr.currency · XCT.QLT

Let an agent handle currencies by code, issuer, status and subunits, and treat crypto tokens and historical currencies with their true status.

Thing Registry Cross-cutting context

Research draft, second pass

A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.

written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify

Researched by: Claude

Purpose and description

Let an agent handle currencies by code, issuer, status and subunits, and treat crypto tokens and historical currencies with their true status.

A system of money in general use in a particular country or area, with a name, code, subunits and issuing authority, such as the euro or the dinar; historical and private currencies also exist.

What it is for: Denominating prices, payments and accounts.

It can be price and pay in it; exchange it for other currencies; identify it, by ISO 4217 code; track its status, as current, historical or replaced.

Distinguishing features

A system of money, not the physical notes

Identified by ISO 4217 code

Subunits such as fals or cents

Tokens such as ERC-20 are not currencies in the legal sense in most jurisdictions

What it looks like

The notes and coins of the currency, its symbol, and its code in accounts.

How it is recognised

Currency symbols such as EUR, USD or local signs

ISO 4217 codes

Historical currencies such as siege money or sycee are collectors items

Related models

is a system of - medium of exchange

money

is represented by - notes and coins

physical money

is issued by - issuer

central bank

is confused with - different legal status

crypto-asset

In practice

Families and kinds

national currencies

currency unions such as the euro

historical currencies

emergency currencies such as siege money

crypto-assets and tokens

Identifiers

ISO 4217 code three letters and three digits for example EUR 978

Standards and regulation

ISO 4217

Central bank laws

EU MiCA regulation on crypto-assets

Failure modes and hazards

Ambiguous symbols such as $ used by many currencies

Treating crypto tokens as legal tender

Using withdrawn currencies

Also called

ERC-20dinarfalsbawbeesiege moneySyceeDajōkan-satsugold dinarmodern gold dinarducatOffa's imitation dinarCekinplay moneyBiblical and Talmudic units of measurementobsolete currencyByzantine coinageContinental currencyring moneyLeu (currency)test currencycollectible coins and currencycolóncruzadoworld currencycurrency unitasset currencyRoman provincial currencyalternative currencynational currencyhard currencyGoryeo currencycoins of the Russian FederationXuPalestinian currencypiastreescudorial / riyalrupeeItalian scudofiat money

+42

Where this came from

wikidata · CC0 1.0

Source repository Registry entry point

Also registered as vr.tr.currency

Drafted structure

Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.

Identity Which currency.

Codes avoid ambiguous symbols.

Code

ISO 4217.

Code

Currency code.

  1. Which ISO 4217 code identifies this currency? provenance
  2. Could its symbol be confused with another? boundary

Status

Current or historical.

Status

Current status.

  1. Is the currency current, and where? boundary
  2. What replaced it, if historical? provenance
Structure Units and issuer.

Structure matters for accounting.

Units

Subunits.

Subunits

Subunits and minor units.

  1. What subunits does it have? definition
  2. How many decimal places are used? measurement

Issuer

Central bank.

Issuer

The issuing authority.

  1. Who issues it? provenance
  2. Which monetary policy regime applies? definition
Exchange Converting it.

Rates change constantly.

Rate

Exchange rate.

Rate

Rate and source.

  1. What is the exchange rate, from which source and time? provenance
  2. Is the rate fixed or floating? definition

Controls

Capital controls.

Controls

Restrictions.

  1. Are there exchange or capital controls? boundary
  2. Are there multiple official rates? boundary
Non-state and historical Other currencies.

Status must be clear for non-state and historical money.

Crypto-assets

Tokens.

Crypto status

Legal status of tokens.

  1. What is the legal status of this token here? boundary
  2. Must an agent avoid giving investment advice about it? boundary

Historical

Old currencies.

History

Historical context.

  1. When and where was it used? provenance
  2. Is it still redeemable? boundary

What the second pass must settle

  • Should currencies be instances with ISO codes?
  • How should historical currencies be linked to successors?
  • How should crypto-assets be classified?
Draft as JSON