/**
 * The name of the OpenTelemetry tracer used by the Durable Task SDK.
 * This is consistent across all language SDKs for cross-language trace correlation.
 */
export declare const TRACER_NAME = "Microsoft.DurableTask";
/**
 * Semantic attribute keys for Durable Task spans.
 * These follow the conventions established by the .NET SDK for cross-language consistency.
 */
export declare const DurableTaskAttributes: {
    /** The type of durable task (e.g., "orchestration", "activity"). */
    readonly TYPE: "durabletask.type";
    /** The name of the task (orchestration or activity name). */
    readonly TASK_NAME: "durabletask.task.name";
    /** The version of the task. */
    readonly TASK_VERSION: "durabletask.task.version";
    /** The instance ID of the orchestration. */
    readonly TASK_INSTANCE_ID: "durabletask.task.instance_id";
    /** The execution ID of the orchestration. */
    readonly TASK_EXECUTION_ID: "durabletask.task.execution_id";
    /** The status of the orchestration (e.g., "COMPLETED", "FAILED"). */
    readonly TASK_STATUS: "durabletask.task.status";
    /** The sequential task ID within an orchestration. */
    readonly TASK_TASK_ID: "durabletask.task.task_id";
    /** The target instance ID for event operations. */
    readonly EVENT_TARGET_INSTANCE_ID: "durabletask.event.target_instance_id";
    /** The fire-at time for timer operations. */
    readonly FIRE_AT: "durabletask.fire_at";
    /**
     * The DurableTask replay span ID. This is the OTEL span ID from the first
     * execution of an orchestration, carried forward across replays for correlation.
     * It may differ from the current OTEL span's spanId on replay invocations.
     */
    readonly REPLAY_SPAN_ID: "durabletask.task.replay_span_id";
    /**
     * The original start time of the orchestration from its first execution,
     * carried forward across replays for correlation. This is stored as an
     * ISO-8601 string attribute so that replay spans can start at the current
     * time (avoiding artificially long span durations) while still preserving
     * a reference to the original execution start.
     */
    readonly REPLAY_START_TIME: "durabletask.task.replay_start_time";
    /** The name of the entity operation (e.g., "add", "get"). */
    readonly ENTITY_OPERATION: "durabletask.entity.operation";
    /** The target entity instance ID for entity operations. */
    readonly ENTITY_INSTANCE_ID: "durabletask.entity.instance_id";
};
/**
 * Task type values used in the `durabletask.type` attribute.
 */
export declare const TaskType: {
    readonly ORCHESTRATION: "orchestration";
    readonly ACTIVITY: "activity";
    readonly EVENT: "event";
    readonly TIMER: "timer";
    readonly CREATE_ORCHESTRATION: "create_orchestration";
    readonly ORCHESTRATION_EVENT: "orchestration_event";
    readonly ENTITY: "entity";
    readonly SIGNAL_ENTITY: "signal_entity";
    readonly CALL_ENTITY: "call_entity";
};
/**
 * Creates a span name following the Durable Task naming convention.
 *
 * Format: "{type}:{name}" or "{type}:{name}@({version})"
 *
 * @param type - The task type (e.g., "orchestration", "activity").
 * @param name - The task name.
 * @param version - An optional task version.
 * @returns The formatted span name.
 */
export declare function createSpanName(type: string, name: string, version?: string): string;
/**
 * Creates a timer span name following the Durable Task naming convention.
 *
 * Format: "orchestration:{orchName}:timer"
 *
 * @param orchestrationName - The name of the parent orchestration.
 * @returns The formatted timer span name.
 */
export declare function createTimerSpanName(orchestrationName: string): string;