import { TreeIndex } from './TreeIndex';
/**
 * A node in a Gedcom file.
 */
export interface TreeNode {
    /**
     * The Gedcom tag of this node. Usually in uppercase, possibly starting with an underscore.
     * The root is the only node for which the tag is <code>null</code>.
     */
    tag: string | null;
    /**
     * An optional pointer, used to reference this node elsewhere. Starts and ends with the <code>@</code> symbol and contains an uppercase identifier.
     */
    pointer: string | null;
    /**
     * An optional string value. Can be any string.
     */
    value: string | null;
    /**
     * Absolute node index in source file, namely the line number minus one.
     * The <code>CONT</code> and <code>CONC</code> pseudo-tags are included in the count, hence possibly introducing gaps in the indices.
     */
    indexSource: number;
    /**
     * Node index in the output tree, relative to the parent.
     */
    indexRelative: number;
    /**
     * This node's children nodes.
     */
    children: TreeNode[];
    /**
     * The index for this node, if computed.
     * It can be safely serialized as it does not contain any reference, but rather indices (represented as integers).
     */
    _index?: TreeIndex;
}