<?xml version=“1.0” encoding=“UTF-8”?> <SearchParameter xmlns=“hl7.org/fhir”>
<id value="filter"/> <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/filter"/> <version value="1"/> <name value="FilterSearchParameter"/> <status value="draft"/> <experimental value="false"/> <date value="2018-07-26"/> <publisher value="Health Level Seven International (FHIR Infrastructure)"/> <contact> <name value="FHIR Project"/> <telecom> <system value="url"/> <value value="http://hl7.org/fhir"/> </telecom> </contact> <description value="This is the formal declaration for the _filter parameter, documented at [http://hl7.org/fhir/search_filter.html](http://hl7.org/fhir/search_filter.html)"/> <!-- this is the canonical definition for the _id search parameter --> <purpose value="Support combination searches when the simple name=value basis of search cannot express what is required"/> <code value="_filter"/> <base value="Resource"/><!-- all resources --> <type value="special"/>
</SearchParameter>