export declare const RetrieveParamsSchema: {
    $schema: string;
    title: string;
    description: string;
    type: string;
    additionalProperties: boolean;
    properties: {
        metadata: {
            type: string;
        };
        head: {
            type: string;
        };
        dl: {
            type: string;
        };
        cache: {
            type: string;
        };
        extension: {
            type: string;
        };
    };
};