/**
 * Version symbols for published CWL document versions.
 */
export declare type CWLVersion = "draft-2" | "draft-3.dev1" | "draft-3.dev2" | "draft-3.dev3" | "draft-3.dev4" | "draft-3.dev5" | "draft-3" | "draft-4.dev1" | "draft-4.dev2" | "draft-4.dev3" | "v1.0.dev4" | "v1.0" | "v1.1" | "v1.2";