export declare function normalizeContentType(contentType: string | undefined): string | undefined;
export declare function rdfContentTypeForPath(filePath: string): string | undefined;
export declare function isLineAddressableRdfContentType(contentType: string | undefined): boolean;
export declare function isLineAddressableRdfPath(filePath: string): boolean;
export declare function isLineAddressableRdf(contentType: string | undefined, filePath?: string): boolean;
export declare function isRdfDocumentContentType(contentType: string | undefined): boolean;
export declare function isRdfDocumentPath(filePath: string): boolean;
export declare function isRdfDocument(contentType: string | undefined, filePath?: string): boolean;
export declare function isSafeRdfDocumentContentType(contentType: string | undefined): boolean;