<?xml version=“1.0” encoding=“UTF-8”?> <SearchParameter xmlns=“hl7.org/fhir”>
<id value="example-extension"/> <meta> <security> <system value="http://terminology.hl7.org/CodeSystem/v3-ActReason"/> <code value="HTEST"/> <display value="test health data"/> </security> </meta> <url value="http://hl7.org/fhir/SearchParameter/example-extension"/> <name value="Example Search Parameter on an extension"/> <status value="draft"/> <experimental value="true"/> <publisher value="Health Level Seven International (FHIR Infrastructure)"/> <contact> <telecom> <system value="url"/> <value value="http://hl7.org/fhir"/> </telecom> </contact> <description value="Search by url for a participation agreement, which is stored in a DocumentReference"/> <code value="part-agree"/> <base value="Patient"/> <type value="reference"/> <expression value="DocumentReference.extension('http://example.org/fhir/StructureDefinition/participation-agreement')"/> <xpath value="f:DocumentReference/f:extension[@url='http://example.org/fhir/StructureDefinition/participation-agreement']"/> <xpathUsage value="normal"/> <target value="DocumentReference"/>
</SearchParameter>