/**
 * GLD (Grondwaterstandonderzoek / groundwater level research) resolvers.
 *
 * A GLD carries a reference to a GMW monitoring tube plus a set of groundwater
 * level {@link GLDObservation} series. Each observation is an OGC
 * `om:OM_Observation` whose result is a WaterML2 `MeasurementTimeseries` - a list
 * of `{time, value, qualifier}` points. Those OGC subtrees live outside the BRO
 * namespaces (so the coverage checker treats `dsgld:observation` as one opaque
 * leaf); this resolver reads their internals.
 *
 * The flat scalar fields (`researchFirstDate`, `researchLastDate`) are generated
 * into `schemas/generated/gld.generated.ts` and bound via `GLD_SCALARS`.
 */
import type { ResolverContext, GLDObservation, GroundwaterMonitoringTubeRef } from "../types/index.js";
/**
 * The monitoring tube (GMW well + tube number) the research pertains to.
 * Bound with `xpath: "."` so the resolver gets the registration-object node.
 */
export declare function processMonitoringPoint(_value: string | null, context: ResolverContext): GroundwaterMonitoringTubeRef | null;
/** broIds of the groundwater monitoring nets (GMN) the research belongs to. */
export declare function processMonitoringNets(_value: string | null, context: ResolverContext): Array<string>;
/**
 * Parse all groundwater level observation series.
 *
 * Bound with `xpath: "."`; iterates the registration object's
 * `dsgld:observation/om:OM_Observation` children. NamedValue parameters are keyed
 * by their `om:name/@xlink:href`, so we select each by that key.
 */
export declare function processObservations(_value: string | null, context: ResolverContext): Array<GLDObservation>;
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