import { MarkdownRenderer } from '../rendering.types';
import { RichTextEntry, MarkdownEntry } from '../shared.types';
/**
 * A markdown entry for generating subscript text.
 */
export interface SubscriptEntry extends MarkdownEntry, RichTextEntry {
    /**
     * The subscript contents and identifying property for the renderer.
     */
    sub: RichTextEntry;
    /**
     * Option to render the subscript indicators as HTML.
     * Default: false
     */
    html?: boolean;
}
/**
 * The renderer for subscript entries.
 *
 * @param entry The subscript entry.
 * @param options Document-level render options.
 * @returns Subscript markdown content.
 */
export declare const subRenderer: MarkdownRenderer;
/**
 * Helper which creates a subscript text entry.
 *
 * @param options Entry-level options for this element.
 * @returns a subscript text entry
 */
export declare function sub(content: SubscriptEntry['sub'], options?: Omit<SubscriptEntry, 'sub'>): SubscriptEntry;