/** What tells two states of a stemma apart, version by version. */
import { Edition } from "../model/Edition.js";
/**
 * How a version differs between two states of the edition: whether it
 * is in either, what it derives from in each, and which symbols it
 * inserts and deletes in one and not the other.
 * @category Filiation
 */
export interface VersionChange {
    version: string;
    /** The version it derives from in the state before, where it is in that state. */
    parentBefore?: string | null;
    /** The version it derives from in the state after, where it is in that state. */
    parentAfter?: string | null;
    inserted: {
        kept: number;
        gone: string[];
        added: string[];
    };
    deleted: {
        kept: number;
        gone: string[];
        added: string[];
    };
}
/**
 * Version by version, how the stemma of one state of the edition differs
 * from that of another, as when a proposed stemma is set against the one
 * the edition holds. The versions of the state before come first, in
 * their order, then those only the state after holds.
 * @category Filiation
 */
export declare const stemmaChanges: (before: Pick<Edition, 'versions'>, after: Pick<Edition, 'versions'>) => VersionChange[];