{"version":"reconciled-tree-49","policy":{"name":"Adopted monetary basis (step-parent)","definition":"Deliberate, implemented adoption of another currency as a unit model or exchange-rate anchor, without replacing documented historical ancestry.","subtypes":{"unit_adoption":"Dated adoption or redefinition of a principal account unit by explicit reference to another currency; no continuing peg inferred.","exchange_rate_anchor":"Documented standing parity commitment with an operational monetary mechanism; dates, changes and limitations required."},"admission_tests":["A named currency is deliberately selected; numerical coincidence is insufficient.","The rule governs the principal account unit or general monetary regime; limited sectoral scope must be explicit.","Implementation is evidenced by operative account definitions, conversion of obligations, issuance, redemption or intervention arrangements.","Evidence supports the precise subtype; initial equality does not prove a continuing peg.","Effective dates, observation dates, ratios, bands, mechanisms, endings and gaps are distinguished."],"exclusions":["Shared metal content without explicit account-unit adoption","Coin design, mint technique, subdivision or name copying alone","Market exchange correlation or a quotation alone","A customs tariff or individual contract valuation alone","Reserve holdings alone","A proposal without implementation","Political conquest alone"],"identity_rule":"Do not create a currency node for a peg, rescaling or change of monetary basis. A separately established new unit is adjudicated under the existing identity policy.","kinship_rule":"Keep founding ancestry. No transitive step-parent inheritance, sibling/cousin derivation, or automatic anchor succession. Co-anchoring requires overlapping evidenced periods and is not genealogical kinship.","depth_rule":"Exclude every adopted-basis edge and its event dates from ancestry traversal, origin dates, predecessor coverage and all strict/qualified/optional depth metrics.","temporal_rule":"A unit adoption is an event. An anchor is a regime with dated observations and changes. Unknown end does not mean current. A switch closes the earlier anchor only where evidenced. Legal commitment and actual operation may differ.","display_rule":"Separate opt-in overlay, purple connector with a diamond on the recipient at the event or first witnessed date; qualification uses opacity and explicit text, not the ancestry dash convention. Profiles always show admitted step-parents.","basket_rule":"Record a basket as a structured reference, never an invented currency or several unqualified bilateral parents. No basket is admitted in this revision."},"rows":[{"id":"R0399","parent":"FTM000175","child":"FTM000278","kind":"unit_adoption","layer":"adopted_basis","relationship_role":"adopted_monetary_basis","ancestry_role":"non_ancestry_adopted_basis","creates_currency":false,"founding_predecessor":false,"include_in_ancestry":false,"include_in_depth":false,"date_is_creation":false,"date":{"earliest_year":1891,"latest_year":1891,"precision":"year","qualifier":"reported","calendar":"CE/BCE, historical year numbering; no year zero","original_text":"1891"},"date_role":"implemented_reform_year","scope":"Tunisia adopted the French franc unit in the implemented 1891 reform while replacing local piastre accounting.","territorial_scope":"Principal currency/account unit in the indicated jurisdiction.","mechanism":"Officially reported unit substitution and franc-denominated issues.","ratio_text":"French franc unit adopted; no universal cash-conversion ratio asserted.","limitations":"The piastre remains the local succession parent. No continuing peg duration is inferred.","temporal_label":"1891 · unit adoption event","temporal":{"type":"event","start":{"earliest_year":1891,"latest_year":1891,"precision":"year","qualifier":"reported","calendar":"CE/BCE, historical year numbering; no year zero","original_text":"1891"},"end":null,"end_exclusive":false,"end_status":"not_applicable_event","observed_through":null,"continuity":"only_as_stated_in_sources"},"rate_changes":[],"replaces_adopted_basis_id":null,"status":"supported","display_evidence":{"status":"supported","line_style":"solid","marker":"diamond","qualification_scope":"this_relationship_only"},"claim_ids":["C981","C1588","C1959"],"current_basis_claim_ids":["C1959"],"source_ids":["S465"]},{"id":"R0411","parent":"T-FTM000481","child":"FTM000075","kind":"unit_adoption","layer":"adopted_basis","relationship_role":"adopted_monetary_basis","ancestry_role":"non_ancestry_adopted_basis","creates_currency":false,"founding_predecessor":false,"include_in_ancestry":false,"include_in_depth":false,"date_is_creation":false,"date":{"earliest_year":1924,"latest_year":1925,"precision":"range","qualifier":"range","calendar":"CE/BCE, historical year numbering; no year zero","original_text":"1924–1925"},"date_role":"implementation_window","scope":"Guatemala deliberately defined the quetzal equal to one US dollar and chose sixty pesos per quetzal using prior dollar exchange values.","territorial_scope":"Principal currency/account unit in the indicated jurisdiction.","mechanism":"Monetary reform with implemented local peso conversion and subsequent quetzal issue.","ratio_text":"1 GTQ = 1 USD at reform; 60 local pesos = 1 GTQ.","limitations":"Dollar value was explicitly selected; this is more than matching metal content. No ongoing peg or transfer of US debts is inferred.","temporal_label":"1924–1925 · unit adoption event","temporal":{"type":"event","start":{"earliest_year":1924,"latest_year":1925,"precision":"range","qualifier":"range","calendar":"CE/BCE, historical year numbering; no year zero","original_text":"1924–1925"},"end":null,"end_exclusive":false,"end_status":"not_applicable_event","observed_through":null,"continuity":"only_as_stated_in_sources"},"rate_changes":[],"replaces_adopted_basis_id":null,"status":"supported","display_evidence":{"status":"supported","line_style":"solid","marker":"diamond","qualification_scope":"this_relationship_only"},"claim_ids":["C993","C1603","C1960"],"current_basis_claim_ids":["C1960"],"source_ids":["S733","S471"]},{"id":"SP-V32-001","parent":"T-FTM000497","child":"T-FTM000464","kind":"exchange_rate_anchor","layer":"adopted_basis","relationship_role":"adopted_monetary_basis","ancestry_role":"non_ancestry_adopted_basis","creates_currency":false,"founding_predecessor":false,"include_in_ancestry":false,"include_in_depth":false,"date_is_creation":false,"date":{"earliest_year":1935,"latest_year":1935,"precision":"day","qualifier":"reported","calendar":"CE/BCE, historical year numbering; no year zero","original_text":"1935-11-09","iso_date":"1935-11-09"},"date_role":"anchor_introduction","scope":"Hong Kong instituted a sterling anchor in 1935. Postwar tables document its continuation and 1967 parity change before the switch to USD.","territorial_scope":"Principal currency/account unit in the indicated jurisdiction.","mechanism":"Exchange Fund and certificates backing banknote issue; postwar official parity regime.","ratio_text":"Initially 16 HKD per GBP; 14.55 from 23 November 1967.","limitations":"Wartime operation and the exact pre-1972 break following sterling flotation are not fully resolved; do not read the outer dates as uninterrupted daily convertibility.","temporal_label":"1935 introduction; postwar evidence 1946–1972","temporal":{"type":"regime","start":{"earliest_year":1935,"latest_year":1935,"precision":"day","qualifier":"reported","calendar":"CE/BCE, historical year numbering; no year zero","original_text":"1935-11-09","iso_date":"1935-11-09"},"end":{"earliest_year":1972,"latest_year":1972,"precision":"day","qualifier":"reported","calendar":"CE/BCE, historical year numbering; no year zero","original_text":"1972-07-06","iso_date":"1972-07-06"},"end_exclusive":true,"end_status":"documented","observed_through":null,"continuity":"intervening_operation_not_fully_reviewed"},"rate_changes":[{"date":"1967-11-23","text":"14.55 HKD per GBP; revaluation within the sterling anchor."}],"replaces_adopted_basis_id":null,"status":"supported","display_evidence":{"status":"supported","line_style":"solid","marker":"diamond","qualification_scope":"this_relationship_only"},"claim_ids":["C1961"],"current_basis_claim_ids":["C1961"],"source_ids":["S453","S1019"]},{"id":"SP-V32-002","parent":"T-FTM000481","child":"T-FTM000464","kind":"exchange_rate_anchor","layer":"adopted_basis","relationship_role":"adopted_monetary_basis","ancestry_role":"non_ancestry_adopted_basis","creates_currency":false,"founding_predecessor":false,"include_in_ancestry":false,"include_in_depth":false,"date_is_creation":false,"date":{"earliest_year":1972,"latest_year":1972,"precision":"day","qualifier":"reported","calendar":"CE/BCE, historical year numbering; no year zero","original_text":"1972-07-06","iso_date":"1972-07-06"},"date_role":"effective_start","scope":"Hong Kong fixed its dollar to USD in July 1972, changed the parity in February 1973, and ended the commitment when it floated in November 1974.","territorial_scope":"Principal currency/account unit in the indicated jurisdiction.","mechanism":"Government undertaking to maintain the specified exchange rate.","ratio_text":"5.65 HKD per USD initially; 5.085 from 14 February 1973.","limitations":"Separate from the 1983 currency-board episode. No dollar anchor is drawn across the floating interval.","temporal_label":"6 July 1972 – 26 November 1974","temporal":{"type":"regime","start":{"earliest_year":1972,"latest_year":1972,"precision":"day","qualifier":"reported","calendar":"CE/BCE, historical year numbering; no year zero","original_text":"1972-07-06","iso_date":"1972-07-06"},"end":{"earliest_year":1974,"latest_year":1974,"precision":"day","qualifier":"reported","calendar":"CE/BCE, historical year numbering; no year zero","original_text":"1974-11-26","iso_date":"1974-11-26"},"end_exclusive":true,"end_status":"documented","observed_through":null,"continuity":"only_as_stated_in_sources"},"rate_changes":[{"date":"1973-02-14","text":"5.085 HKD per USD."}],"replaces_adopted_basis_id":"SP-V32-001","status":"supported","display_evidence":{"status":"supported","line_style":"solid","marker":"diamond","qualification_scope":"this_relationship_only"},"claim_ids":["C1962"],"current_basis_claim_ids":["C1962"],"source_ids":["S1019"]},{"id":"SP-V32-003","parent":"T-FTM000481","child":"T-FTM000464","kind":"exchange_rate_anchor","layer":"adopted_basis","relationship_role":"adopted_monetary_basis","ancestry_role":"non_ancestry_adopted_basis","creates_currency":false,"founding_predecessor":false,"include_in_ancestry":false,"include_in_depth":false,"date_is_creation":false,"date":{"earliest_year":1983,"latest_year":1983,"precision":"day","qualifier":"reported","calendar":"CE/BCE, historical year numbering; no year zero","original_text":"1983-10-17","iso_date":"1983-10-17"},"date_role":"effective_start","scope":"Hong Kong restored a USD link through its currency-board system in 1983; the inspected later description specifies a 7.75–7.85 exchange band.","territorial_scope":"Principal currency/account unit in the indicated jurisdiction.","mechanism":"Currency-board note-issue mechanism and operational exchange band.","ratio_text":"1983 linked rate: 7.80 HKD per USD; later observed band: 7.75–7.85.","limitations":"End not established in this review. The later band is not backdated to 1983.","temporal_label":"17 October 1983; confirmed in the 2024 description","temporal":{"type":"regime","start":{"earliest_year":1983,"latest_year":1983,"precision":"day","qualifier":"reported","calendar":"CE/BCE, historical year numbering; no year zero","original_text":"1983-10-17","iso_date":"1983-10-17"},"end":null,"end_exclusive":false,"end_status":"not_established","observed_through":"2024-06-27","continuity":"only_as_stated_in_sources"},"rate_changes":[{"date":"2024-06-27","date_role":"configuration_observed_not_introduced","text":"7.75–7.85 HKD per USD band in the inspected description."}],"replaces_adopted_basis_id":null,"status":"supported","display_evidence":{"status":"supported","line_style":"solid","marker":"diamond","qualification_scope":"this_relationship_only"},"claim_ids":["C1963"],"current_basis_claim_ids":["C1963"],"source_ids":["S1019","S54"]},{"id":"SP-V32-004","parent":"T-FTM000497","child":"T-FTM000515","kind":"exchange_rate_anchor","layer":"adopted_basis","relationship_role":"adopted_monetary_basis","ancestry_role":"non_ancestry_adopted_basis","creates_currency":false,"founding_predecessor":false,"include_in_ancestry":false,"include_in_depth":false,"date_is_creation":false,"date":{"earliest_year":1965,"latest_year":1965,"precision":"day","qualifier":"reported","calendar":"CE/BCE, historical year numbering; no year zero","original_text":"1965-10-06","iso_date":"1965-10-06"},"date_role":"episode_observation_not_first_anchor","scope":"The ECCA episode used a sterling peg before the EC dollar’s 1976 switch to USD.","territorial_scope":"Principal currency/account unit in the indicated jurisdiction.","mechanism":"ECCA currency management with a stated sterling peg.","ratio_text":"4.80 XCD per GBP.","limitations":"The reviewed start is the ECCA issue witness. Earlier British Caribbean sterling links remain to be scoped; this does not create a 1965 currency identity.","temporal_label":"ECCA episode: 6 October 1965 – 7 July 1976","temporal":{"type":"regime","start":{"earliest_year":1965,"latest_year":1965,"precision":"day","qualifier":"reported","calendar":"CE/BCE, historical year numbering; no year zero","original_text":"1965-10-06","iso_date":"1965-10-06"},"end":{"earliest_year":1976,"latest_year":1976,"precision":"day","qualifier":"reported","calendar":"CE/BCE, historical year numbering; no year zero","original_text":"1976-07-07","iso_date":"1976-07-07"},"end_exclusive":true,"end_status":"documented","observed_through":null,"continuity":"only_as_stated_in_sources"},"rate_changes":[],"replaces_adopted_basis_id":null,"status":"supported","display_evidence":{"status":"supported","line_style":"solid","marker":"diamond","qualification_scope":"this_relationship_only"},"claim_ids":["C1964"],"current_basis_claim_ids":["C1964"],"source_ids":["S1020","S1021"]},{"id":"SP-V32-005","parent":"T-FTM000481","child":"T-FTM000515","kind":"exchange_rate_anchor","layer":"adopted_basis","relationship_role":"adopted_monetary_basis","ancestry_role":"non_ancestry_adopted_basis","creates_currency":false,"founding_predecessor":false,"include_in_ancestry":false,"include_in_depth":false,"date_is_creation":false,"date":{"earliest_year":1976,"latest_year":1976,"precision":"day","qualifier":"reported","calendar":"CE/BCE, historical year numbering; no year zero","original_text":"1976-07-07","iso_date":"1976-07-07"},"date_role":"effective_start","scope":"The East Caribbean dollar switched its anchor to USD on 7 July 1976; the ECCB confirmed the unchanged parity in 2021.","territorial_scope":"Principal currency/account unit in the indicated jurisdiction.","mechanism":"Fixed-rate monetary policy supported by pooled foreign reserves and the Council’s parity authority.","ratio_text":"2.70 XCD per USD.","limitations":"No new account identity; present status is not inferred from a 2021 release.","temporal_label":"7 July 1976; confirmed through July 2021","temporal":{"type":"regime","start":{"earliest_year":1976,"latest_year":1976,"precision":"day","qualifier":"reported","calendar":"CE/BCE, historical year numbering; no year zero","original_text":"1976-07-07","iso_date":"1976-07-07"},"end":null,"end_exclusive":false,"end_status":"not_established","observed_through":"2021-07-13","continuity":"only_as_stated_in_sources"},"rate_changes":[],"replaces_adopted_basis_id":"SP-V32-004","status":"supported","display_evidence":{"status":"supported","line_style":"solid","marker":"diamond","qualification_scope":"this_relationship_only"},"claim_ids":["C1965"],"current_basis_claim_ids":["C1965"],"source_ids":["S1021","S1022"]},{"id":"SP-V32-006","parent":"T-FTM000481","child":"T-FTM000523","kind":"exchange_rate_anchor","layer":"adopted_basis","relationship_role":"adopted_monetary_basis","ancestry_role":"non_ancestry_adopted_basis","creates_currency":false,"founding_predecessor":false,"include_in_ancestry":false,"include_in_depth":false,"date_is_creation":false,"date":{"earliest_year":1972,"latest_year":1972,"precision":"day","qualifier":"reported","calendar":"CE/BCE, historical year numbering; no year zero","original_text":"1972-07-31","iso_date":"1972-07-31"},"date_role":"effective_start","scope":"Bermuda fixed its dollar at USD parity on 31 July 1972 under amended authority to define its external value beyond sterling.","territorial_scope":"Principal currency/account unit in the indicated jurisdiction.","mechanism":"Amended BMA statutory parity authority and implemented exchange-rate fixing.","ratio_text":"1 BMD per USD.","limitations":"Distinct from the February 1970 dollar introduction. No continuous-operation or current-status claim is added.","temporal_label":"31 July 1972 introduction; ending unreviewed","temporal":{"type":"regime","start":{"earliest_year":1972,"latest_year":1972,"precision":"day","qualifier":"reported","calendar":"CE/BCE, historical year numbering; no year zero","original_text":"1972-07-31","iso_date":"1972-07-31"},"end":null,"end_exclusive":false,"end_status":"not_established","observed_through":null,"continuity":"only_as_stated_in_sources"},"rate_changes":[],"replaces_adopted_basis_id":null,"status":"supported","display_evidence":{"status":"supported","line_style":"solid","marker":"diamond","qualification_scope":"this_relationship_only"},"claim_ids":["C1966"],"current_basis_claim_ids":["C1966"],"source_ids":["S202"]},{"id":"SP-V32-007","parent":"FTM000387","child":"FTM000263","kind":"exchange_rate_anchor","layer":"adopted_basis","relationship_role":"adopted_monetary_basis","ancestry_role":"non_ancestry_adopted_basis","creates_currency":false,"founding_predecessor":false,"include_in_ancestry":false,"include_in_depth":false,"date_is_creation":false,"date":{"earliest_year":1999,"latest_year":1999,"precision":"day","qualifier":"reported","calendar":"CE/BCE, historical year numbering; no year zero","original_text":"1999-01-01","iso_date":"1999-01-01"},"date_role":"effective_start","scope":"XOF acquired an explicit euro anchor from 1 January 1999 under the continuing monetary cooperation arrangements.","territorial_scope":"Principal currency/account unit in the indicated jurisdiction.","mechanism":"Continuing monetary cooperation arrangements with an explicitly published euro parity.","ratio_text":"655.957 XOF per EUR.","limitations":"The two CFA units remain distinct. The earlier French-franc anchor is retained in evidence and awaits a separately dated operational record. Ending and current operation are not assessed here.","temporal_label":"1 January 1999 · euro anchor introduced","temporal":{"type":"regime","start":{"earliest_year":1999,"latest_year":1999,"precision":"day","qualifier":"reported","calendar":"CE/BCE, historical year numbering; no year zero","original_text":"1999-01-01","iso_date":"1999-01-01"},"end":null,"end_exclusive":false,"end_status":"not_established","observed_through":null,"continuity":"only_as_stated_in_sources"},"rate_changes":[],"replaces_adopted_basis_id":null,"status":"supported","display_evidence":{"status":"supported","line_style":"solid","marker":"diamond","qualification_scope":"this_relationship_only"},"claim_ids":["C1967"],"current_basis_claim_ids":["C1967"],"source_ids":["S381"]},{"id":"SP-V32-008","parent":"FTM000387","child":"FTM000264","kind":"exchange_rate_anchor","layer":"adopted_basis","relationship_role":"adopted_monetary_basis","ancestry_role":"non_ancestry_adopted_basis","creates_currency":false,"founding_predecessor":false,"include_in_ancestry":false,"include_in_depth":false,"date_is_creation":false,"date":{"earliest_year":1999,"latest_year":1999,"precision":"day","qualifier":"reported","calendar":"CE/BCE, historical year numbering; no year zero","original_text":"1999-01-01","iso_date":"1999-01-01"},"date_role":"effective_start","scope":"XAF acquired an explicit euro anchor from 1 January 1999 under the continuing monetary cooperation arrangements.","territorial_scope":"Principal currency/account unit in the indicated jurisdiction.","mechanism":"Continuing monetary cooperation arrangements with an explicitly published euro parity.","ratio_text":"655.957 XAF per EUR.","limitations":"The two CFA units remain distinct. The earlier French-franc anchor is retained in evidence and awaits a separately dated operational record. Ending and current operation are not assessed here.","temporal_label":"1 January 1999 · euro anchor introduced","temporal":{"type":"regime","start":{"earliest_year":1999,"latest_year":1999,"precision":"day","qualifier":"reported","calendar":"CE/BCE, historical year numbering; no year zero","original_text":"1999-01-01","iso_date":"1999-01-01"},"end":null,"end_exclusive":false,"end_status":"not_established","observed_through":null,"continuity":"only_as_stated_in_sources"},"rate_changes":[],"replaces_adopted_basis_id":null,"status":"supported","display_evidence":{"status":"supported","line_style":"solid","marker":"diamond","qualification_scope":"this_relationship_only"},"claim_ids":["C1968"],"current_basis_claim_ids":["C1968"],"source_ids":["S381"]},{"id":"SP-V32-009","parent":"FTM000387","child":"FTM000272","kind":"exchange_rate_anchor","layer":"adopted_basis","relationship_role":"adopted_monetary_basis","ancestry_role":"non_ancestry_adopted_basis","creates_currency":false,"founding_predecessor":false,"include_in_ancestry":false,"include_in_depth":false,"date_is_creation":false,"date":{"earliest_year":1999,"latest_year":1999,"precision":"day","qualifier":"reported","calendar":"CE/BCE, historical year numbering; no year zero","original_text":"1999-01-01","iso_date":"1999-01-01"},"date_role":"effective_start","scope":"KMF acquired an explicit euro anchor from 1 January 1999 under the continuing monetary cooperation arrangements.","territorial_scope":"Principal currency/account unit in the indicated jurisdiction.","mechanism":"Continuing monetary cooperation arrangements with an explicitly published euro parity.","ratio_text":"491.968 KMF per EUR.","limitations":"The two CFA units remain distinct. The earlier French-franc anchor is retained in evidence and awaits a separately dated operational record. Ending and current operation are not assessed here.","temporal_label":"1 January 1999 · euro anchor introduced","temporal":{"type":"regime","start":{"earliest_year":1999,"latest_year":1999,"precision":"day","qualifier":"reported","calendar":"CE/BCE, historical year numbering; no year zero","original_text":"1999-01-01","iso_date":"1999-01-01"},"end":null,"end_exclusive":false,"end_status":"not_established","observed_through":null,"continuity":"only_as_stated_in_sources"},"rate_changes":[],"replaces_adopted_basis_id":null,"status":"supported","display_evidence":{"status":"supported","line_style":"solid","marker":"diamond","qualification_scope":"this_relationship_only"},"claim_ids":["C1969"],"current_basis_claim_ids":["C1969"],"source_ids":["S381"]},{"id":"SP-V35-001","parent":"CUR-V35-MUGHAL-RUPEE","child":"FTM000031","kind":"unit_adoption","layer":"adopted_basis","relationship_role":"adopted_monetary_basis","ancestry_role":"non_ancestry_adopted_basis","creates_currency":false,"founding_predecessor":false,"include_in_ancestry":false,"include_in_depth":false,"date_is_creation":false,"date":{"earliest_year":1740,"latest_year":1740,"precision":"year","qualifier":"reported","calendar":"CE/BCE, historical year numbering; no year zero","original_text":"1740"},"date_role":"implemented_reform_year","scope":"Nader Shah’s implemented 1740 reform deliberately aligned Iranian rupee/naderi reckoning with Indian rupees and set one silver toman equal to 20 silver rupees. Record a qualified unit-adoption event, preserving Iranian ancestry; no continuing market peg is inferred.","territorial_scope":"Iranian state account definitions and reform issues; actual commerce had a narrower and uneven response.","mechanism":"Accounting orders and replacement rupee/naderi issues explicitly aligned to the Indian rupee; supported by VOC and EIC reports reproduced in scholarship.","ratio_text":"1 Iranian silver toman = 20 silver rupees in the reform.","limitations":"Qualified donor association and implementation scope. Commerce remained heavily copper-based. This is an adoption event, not a claim of enduring market parity or uniform compliance.","temporal_label":"1740 · qualified unit adoption event","temporal":{"type":"event","start":{"earliest_year":1740,"latest_year":1740,"precision":"year","qualifier":"reported","calendar":"CE/BCE, historical year numbering; no year zero","original_text":"1740"},"end":null,"end_exclusive":false,"end_status":"not_applicable_event","observed_through":null,"continuity":"only_as_stated_in_sources"},"rate_changes":[],"replaces_adopted_basis_id":null,"status":"qualified","display_evidence":{"status":"qualified","line_style":"solid","marker":"diamond","qualification_scope":"this_relationship_only"},"claim_ids":["C2012"],"current_basis_claim_ids":["C2012"],"source_ids":["S1038"]},{"id":"AB-V49-DUTCH-FLEMISH","parent":"CUR-V49-FLEMISH-GROOT","child":"FTM000337","kind":"unit_adoption","layer":"adopted_basis","relationship_role":"adopted_monetary_basis","ancestry_role":"non_ancestry_adopted_basis","creates_currency":false,"founding_predecessor":false,"include_in_ancestry":false,"include_in_depth":false,"date_is_creation":false,"date":{"earliest_year":1460,"latest_year":1526,"precision":"range","qualifier":"range","calendar":"CE/BCE, historical year numbering; no year zero","original_text":"1460–1526"},"date_role":"qualified_transition_window","scope":"Leuven accounts changed from a gold-based Rhenish gulden to a fixed 20-stuiver unit after 1460. This local evidence helps explain Dutch gulden development but does not establish a nationwide transition date.","territorial_scope":"Leuven account evidence; wider Dutch continuity is qualified.","mechanism":"Fixed stuiver reckoning replaces a variable gold reference in the regional accounting evidence.","ratio_text":"20 stuivers = 40 Flemish groten = one-sixth Flemish pound","limitations":"The post-1460 observation concerns Leuven. The interval is a research window, not a dated national enactment or proof of every intermediate stage.","temporal_label":"After 1460 · regional fixed-account adoption; precise transition uncertain","temporal":{"type":"event","start":{"earliest_year":1460,"latest_year":1526,"precision":"range","qualifier":"range","calendar":"CE/BCE, historical year numbering; no year zero","original_text":"1460–1526"},"end":null,"end_exclusive":false,"end_status":"not_applicable_event","observed_through":null,"continuity":"only_as_stated_in_sources"},"rate_changes":[],"replaces_adopted_basis_id":null,"status":"qualified","display_evidence":{"status":"qualified","line_style":"solid","marker":"diamond","qualification_scope":"this_relationship_only"},"claim_ids":["C2120"],"current_basis_claim_ids":["C2120"],"source_ids":["S1116"]}]}