/**
 * Structural data-format detection for the `data.txt` block. The single source of truth for "is this
 * chunk JSON / XML / YAML", shared by the data-chunk splitter (here) and typebulb.com's summarizer
 * selection (its JSON/XML/YAML summarizers' `canHandle` delegate to these).
 */
export declare function isJsonData(content: string): boolean;
export declare function isXmlData(content: string): boolean;
export declare function isYamlData(content: string): boolean;
/** True if content is a structural format (JSON/XML/YAML) — kept as a single data chunk. */
export declare function isStructuralData(content: string): boolean;
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