export type OpcRelationshipTargetMode = 'Internal' | 'External';
export type OpcRelationshipTargetIssue = 'empty_target' | 'invalid_target_mode' | 'external_target_not_allowed' | 'invalid_encoding' | 'unsafe_target' | 'package_escape' | 'empty_resolved_target' | 'invalid_external_target';
export declare class OpcRelationshipTargetError extends Error {
    readonly issue: OpcRelationshipTargetIssue;
    constructor(issue: OpcRelationshipTargetIssue, message: string);
}
export interface NormalizeOpcRelationshipTargetOptions {
    ownerPart: string;
    target: string;
    targetMode?: string | null;
    allowExternal?: boolean;
}
export interface NormalizedOpcRelationshipTarget {
    mode: OpcRelationshipTargetMode;
    target: string;
}
/**
 * Normalize one OPC relationship target under SafeDocX package-containment
 * policy. Internal targets are decoded once, checked for ambiguous or unsafe
 * URI/path forms, and resolved relative to the owning part. External targets
 * are accepted only when the caller opts in.
 */
export declare function normalizeOpcRelationshipTarget(options: NormalizeOpcRelationshipTargetOptions): NormalizedOpcRelationshipTarget;
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