---
type: "doc"
source: "source/searchparameter-registry.html"
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\[%settitle Defined Search Parameters%\] \[%file newheader%\] \[%file newnavbar%\]

## Defined Search Parameters

| Responsible Owner: [\[%wgt fhir%\]]([%wg fhir%]) Work Group | [Standards Status](versions#std-process):[Informative](versions#std-process) |
| --- | --- |

This page lists all search parameters defined as part of this specification. Additional search parameters associated with extensions can be found in [the extensions search registry]([%extensions-location%]search-params). For further details regarding using search parameters, see [searching](search) on the [RESTful API](http).

All resources have the canonical URL http://hl7.org/fhir/SearchParameter/\[id\] where \[id\] is taken from the table below. You can download [XML](search-parameters.xml) and [JSON](search-parameters.json) source for this page.

<%allsearchparams%>

| Parameter | Type | Id | Description | Paths (Expression) |
| --- | --- | --- | --- | --- |

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