import JSZip from 'jszip';
export declare const RELATIONSHIP_TYPES: {
    readonly START_PART: "http://schemas.microsoft.com/3dmanufacturing/2013/01/3dmodel";
    readonly THUMBNAIL: "http://schemas.openxmlformats.org/package/2006/relationships/metadata/thumbnail";
    readonly PRINT_TICKET: "http://schemas.microsoft.com/3dmanufacturing/2013/01/printticket";
    readonly MUST_PRESERVE: "http://schemas.openxmlformats.org/package/2006/relationships/mustpreserve";
};
/**
 * Represents a relationship between parts in the package
 */
export interface Relationship {
    id: string;
    type: string;
    target: string;
    targetMode?: string;
}
/**
 * Maps relationship IDs to relationship objects
 */
export interface RelationshipMap {
    byId: Map<string, Relationship>;
    byType: Map<string, Relationship[]>;
    all: Relationship[];
}
/**
 * Parses _rels/.rels to extract package-level relationships
 * @param zip JSZip instance of the opened archive
 */
export declare function getRelationships(zip: JSZip): Promise<RelationshipMap>;
/**
 * Gets the start part path from the relationship map
 * @param relationshipMap Relationship map from getRelationships()
 */
export declare function getStartPartPath(relationshipMap: RelationshipMap): string;
/**
 * Gets all relationships of a specific type
 * @param relationshipMap Relationship map from getRelationships()
 * @param type Relationship type to find
 */
export declare function getRelationshipsByType(relationshipMap: RelationshipMap, type: string): Relationship[];
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