/**
 * Timeline Diagram AST Types
 *
 * Represents timeline diagrams with periods, events, and sections.
 */
/**
 * An event in the timeline
 */
export interface TimelineEvent {
    /** Event description */
    text: string;
}
/**
 * A period in the timeline (e.g., "2023", "Q1")
 */
export interface TimelinePeriod {
    /** Period name/label */
    name: string;
    /** Events in this period */
    events: TimelineEvent[];
}
/**
 * A section in the timeline
 */
export interface TimelineSection {
    /** Section name */
    name: string;
    /** Periods in this section */
    periods: TimelinePeriod[];
}
/**
 * The complete Timeline Diagram AST
 */
export interface TimelineAST {
    type: 'timeline';
    /** Diagram title */
    title?: string;
    /** Sections (if using sections) */
    sections: TimelineSection[];
    /** Accessibility title */
    accTitle?: string;
    /** Accessibility description */
    accDescription?: string;
}
/**
 * Create an empty Timeline AST
 */
export declare function createEmptyTimelineAST(): TimelineAST;
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