A curated crosswalk from dissolved entities (Soviet Union, Yugoslavia,
Czechoslovakia, ...) to the modern states that succeeded them – one row per
(entity, successor) pair, dated, so historical panels can be brought onto
the modern ISO spine honestly instead of being silently dropped (or worse:
countrycode resolves "USSR" to Russia alone). Consumed by
dissolve_country() and flagged by check_country_match().
Format
A tibble with one row per (entity, successor):
- historical
Canonical name of the dissolved entity.
- iso3c_hist
The alpha-3 code the entity held at dissolution, where one existed (
SUN,YUG,CSK,DDR,ANT,SCG,YMD, ...); it may since have been inherited by a successor (e.g.YEM).- dissolved
Year the entity ceased to exist.
- iso3c, country
The successor state.
- relation
How the successor relates to the entity, per successor:
"succession"if it is a genuinely new state created atdissolved, or"continuation"if the same state carried on (possibly with less territory) or a state that already existed absorbed the entity. Sudan is both at once –SDNcontinued andSSDis new – which is why the relation is per successor rather than per entity. The distinction matters: a"continuation"was not created atdissolved, so testing its data against that year says nothing, and the code did not cease to exist either.audit_time_coverage()keys on this column for both reasons.