import { AttributeOperand, SimpleAttributeOperand } from "node-opcua-types";
import { Variant } from "node-opcua-variant";
import type { FilterContext } from "./filter_context.js";
/**
 * OPC 10000-4 7.4.4.5: a SimpleAttributeOperand with an empty browsePath denotes the instance of
 * typeDefinitionId itself, not "nothing to do". A ConditionId operand (typeDefinitionId
 * ConditionType or a subtype, attributeId NodeId, empty browsePath) resolves to the event's own
 * condition instance NodeId - this is what every Alarms and Conditions client sends, in both the
 * select clause (delivery, via extractEventField) and the where clause (evaluation, via
 * resolveOperand below). FEAT-58 taught the select-clause validation this; both consumers share
 * this one resolution so they never drift apart again.
 *
 * Returns undefined when the operand does not match this shape, so the caller falls back to its
 * normal browsePath resolution.
 */
export declare function resolveConditionIdOperand(context: FilterContext, operand: SimpleAttributeOperand): Variant | undefined;
export declare function resolveOperand(context: FilterContext, operand: SimpleAttributeOperand | AttributeOperand): Variant;
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