{description: How a search parameter relates to the set of elements returned by evaluating its xpath query., package_name: hl7.fhir.uv.xver-r4b.r4.r4, name: XPathUsageType, type: null, package_version: 0.0.1-snapshot-2, class: unknown, kind: null, url: 'http://hl7.org/fhir/search-xpath-usage', version: 4.3.0}