export declare const XMLNS_NAMESPACE = "http://www.w3.org/2000/xmlns/";
export declare const XML_NAMESPACE = "http://www.w3.org/XML/1998/namespace";
export declare function declareInheritedNamespaces(importedRoot: Element, sourceRoot: Element): void;
export declare function collectRetainedNamespaces(root: Element, retained: Set<string>): void;
/** Clones XML without relying on DOM importNode prefix preservation. */
export declare function cloneXmlElement(document: Document, source: Element): Element;
export declare function xmlNamespaceUri(element: Element, prefix: string): string | null;
export declare function xmlDeclaredPrefix(root: Element, namespace: string): string | null;
export declare function xmlAttributeNamespace(element: Element, item: Attr): string | null;
export declare function xmlAttributePrefix(item: Attr): string | null;
export declare function xmlAttributeLocalName(item: Attr): string;
export declare function hasXmlAttribute(element: Element, namespace: string, localName: string): boolean;
export declare function hasUnexpectedXmlAttributes(element: Element, allowedUnqualified: ReadonlySet<string>): boolean;
export declare function hasNonWhitespaceXmlText(element: Element): boolean;
export declare function isStructurallyValidAlternateContent(element: Element): boolean;
export declare function assertXmlRoot(root: Element, localName: string, namespaces: ReadonlySet<string>, message: string): void;