/**
 * @fileoverview Place-name folding, and the registry spellings of the country
 * and US state synonyms ClinicalTrials.gov resolves, for ranking a study's sites
 * against a requested location.
 * @module mcp-server/tools/utils/place-names
 */
/**
 * The words of a place name, folded the way upstream folds a location match so
 * a site ranks the way it was found: `Montréal` and `Montreal`, `Wrocław` and
 * `Wroclaw`, `St. Louis` and `St Louis`. Lowercased first, since stripping
 * marks before lowercasing changes context-dependent case mappings (`İ`); then
 * decomposed and stripped of combining marks; then the Latin letters with no
 * decomposition mapped; then periods and apostrophes deleted, so `D.C.` is one
 * word, `dc`; then split on every run of anything but letters and digits. Each
 * step is one linear pass over the name.
 */
export declare function foldedWords(name: string): string[];
/**
 * The registry's spelling of a requested country when it folds (`foldedWords`)
 * to a synonym row — `USA` and `u.s.a.` give `United States` — else the request
 * as given.
 */
export declare function registryCountry(requested: string): string;
/**
 * The registry's spelling of a requested state: a US state or DC abbreviation
 * (`WA`, `d.c.`) gives its name when `country` is, or resolves through
 * `registryCountry` to, the United States; anything else is returned as given.
 */
export declare function registryState(requested: string, country: string): string;
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