/**
 * Glyph markup validation + Trusted-Types-safe parsing for ds-icon.
 *
 * Glyphs normally come from the trusted @ds-mo/icons build pipeline, but
 * `registerIcons` accepts arbitrary app-provided strings and injection is a
 * sink — so every glyph is validated at the render boundary. Injection uses
 * parsed DOM nodes (never innerHTML), which keeps ds-icon working under a
 * strict CSP with `require-trusted-types-for 'script'`.
 */
/** Structural view of an element so the walk is unit-testable without a DOM. */
export interface IconSvgElementLike {
    localName: string;
    getAttributeNames(): string[];
    getAttribute(name: string): string | null;
    children: ArrayLike<IconSvgElementLike>;
}
/** True when `root` is an `<svg>` whose whole tree passes validation. */
export declare function isValidIconSvgRoot(root: IconSvgElementLike | null): boolean;
/**
 * Parse + validate glyph markup. Returns a detached `<svg>` element ready to
 * append (appending adopts it into the document), or `null` when the markup
 * is not well-formed XML, not rooted at `<svg>`, or fails validation —
 * ds-icon renders an empty fixed-size box in that case.
 */
export declare function parseIconSvg(svg: string): SVGElement | null;
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