Release 4

This page is part of the FHIR Specification (v4.0.1: R4 - Mixed Normative and STU) in it's permanent home (it will always be available at this URL). The current version which supercedes this version is 5.0.0. For a full list of available versions, see the Directory of published versions . Page versions: R5 R4B R4

Searchparameter-filter.xml

FHIR Infrastructure Work Group

Maturity Level: N/A

Standards Status: Informative

Compartments: Not linked to any defined compartments

Raw XML (canonical form + also see XML Format Specification)

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Formal Definition for _filter parameter (id = "filter")

<?xml version="1.0" encoding="UTF-8"?>

<SearchParameter xmlns="http://hl7.org/fhir">
  <id value="filter"/> 
  <text> <status value="generated"/> <div xmlns="http://www.w3.org/1999/xhtml"><p> <b> Generated Narrative with Details</b> </p> <p> <b> id</b> : filter</p> <p> <b> url</b> : <b> http://hl7.org/fhir/SearchParameter/filter</b> </p> <p> <b> version</b> : 1</p> <p> <b> name</b> : FilterSearchParameter</p> <p> <b> status</b> : draft</p> <p> <b> experimental</b> : false</p> <p> <b> date</b> : 26/07/2018</p> <p> <b> publisher</b> : Health Level Seven International (FHIR Infrastructure)</p> <p> <b> contact</b> : </p> <p> <b> description</b> : This is the formal declaration for the _filter parameter, documented at [http://hl7.org/fhir/searc
        h_filter.html](http://hl7.org/fhir/search_filter.html)</p> <p> <b> purpose</b> : Support combination searches when the simple name=value basis of search cannot express
         what is required</p> <p> <b> code</b> : _filter</p> <p> <b> base</b> : Resource</p> <p> <b> type</b> : special</p> </div> </text> <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>

Usage note: every effort has been made to ensure that the examples are correct and useful, but they are not a normative part of the specification.