/**
 * Sankey Diagram AST Types
 *
 * Represents Sankey diagrams showing flow between nodes with weighted links.
 */
/**
 * A node in the Sankey diagram
 */
export interface SankeyNode {
    /** Unique identifier for the node */
    id: string;
    /** Display label for the node */
    label: string;
}
/**
 * A link between two nodes in the Sankey diagram
 */
export interface SankeyLink {
    /** Source node ID */
    source: string;
    /** Target node ID */
    target: string;
    /** Flow value/weight of the link */
    value: number;
}
/**
 * The complete Sankey Diagram AST
 */
export interface SankeyAST {
    type: 'sankey';
    /** All nodes in the diagram */
    nodes: Map<string, SankeyNode>;
    /** All links in the diagram */
    links: SankeyLink[];
}
/**
 * Create an empty Sankey AST
 */
export declare function createEmptySankeyAST(): SankeyAST;
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