import { Tag } from '@malloydata/malloy-tag';
export declare const VIZ_CHART_TYPES: string[];
/**
 * Convert legacy chart tags to viz format internally.
 */
export declare function convertLegacyToVizTag(tag: Tag): Tag;
/**
 * Get the effective chart type from a normalized tag
 */
export declare function getChartTypeFromNormalizedTag(normalizedTag: Tag): string | undefined;