export declare const DOCX_WORDPROCESSING_NAMESPACES: Set<string>;
export type DocxExtensionDocumentRole = 'generated' | 'source';
export interface DocxIgnorableExtensionOptions {
    semanticKey?: (element: Element, role: DocxExtensionDocumentRole) => string;
    isAdditionalSemanticNamespace?: (namespace: string) => boolean;
    allowExtensionNamespace?: (namespace: string) => boolean;
    allowMatchedElementMerge?: (generated: Element, source: Element, depth: number) => boolean;
    allowSemanticElement?: (element: Element, generatedSemanticNames: ReadonlySet<string>) => boolean;
}
export interface DocxIgnorableExtensionPair {
    generated: Element;
    source: Element;
}
export declare function mergeDocxIgnorableExtensions(generatedDocument: Document, sourceDocument: Document, options?: DocxIgnorableExtensionOptions): void;
export declare function mergeDocxIgnorableExtensionsAtPairs(generatedDocument: Document, sourceDocument: Document, pairs: readonly DocxIgnorableExtensionPair[], options?: DocxIgnorableExtensionOptions): void;