<SearchParameter xmlns="http://hl7.org/fhir">
  <id value="ServiceQueueLengthSP" />
  <url value="http://omi.de/fhir/registry/SearchParameter/ServiceQueueLengthSP" />
  <version value="0.3.28" />
  <name value="ServiceQueueLengthSP" />
  <status value="active" />
  <publisher value="MOLIT gGmbH" />
  <description value="Search by the queue length in the ServiceStatus extension." />
  <code value="queue-length" />
  <base value="HealthcareService" />
  <type value="number" />
  <expression value="HealthcareService.extension.where(url = 'http://omi.de/fhir/registry/StructureDefinition/ServiceStatusExtension').extension.where(url = 'queue-length').value" />
</SearchParameter>