### Search parameters for HC Organization

This IG defines no new SearchParameters for the Organization resource; it expects implementers to support common Organization parameters from both AU Core and R4.

#### Search parameters defined within AU Core
How these identifier searches can be used is described in [AU Core documentation](https://build.fhir.org/ig/hl7au/au-fhir-core/StructureDefinition-au-core-organization.html#notes). AU Core recommends using the standard FHIR `identifier` search parameter (token, system|value) for organization identifiers. Examples:

- ABN: `GET /Organization?identifier=http://hl7.org.au/id/abn|12345678912`
- ACN: `GET /Organization?identifier=http://hl7.org.au/id/acn|123456789`
- HPI-O: `GET /Organization?identifier=http://ns.electronichealth.net.au/id/hi/hpio/1.0|8003626566707032`
- HSP-O: `GET /Organization?identifier=http://ns.electronichealth.net.au/id/hi/hspo/1.0|8003640001234569`

#### Search parameters defined within FHIR R4
The following parameters are inherited from [R4](https://hl7.org/fhir/R4/organization.html) and are commonly useful; implementers SHOULD support them as indicated.

- [`name`](https://hl7.org/fhir/R4/organization.html#search)  
Standard R4 parameter that searches Organization.name and Organization.alias (partial matches supported). String type. 
Example: `GET /Organization?name=Example%20Aged`

- [`type`](https://hl7.org/fhir/R4/organization.html#search)  
Standard R4 parameter that searches Organization.type.coding using token semantics (system|code).
Example: `Organization?type=http://snomed.info/sct|257652008`

<table class="list">
<tbody>
      <tr>
            <th>Parameter(s)</th>
            <th>Conformance</th>
            <th>Type(s)</th>
            <th>Requirements (when used alone or in combination)</th>
      </tr>
      <tr>
            <td>_id</td>
            <td><b>SHOULD</b></td>
            <td><code>token</code></td>
            <td></td>
      </tr>
      <tr>
            <td>HPI-O</td>
            <td><b>SHOULD</b></td>
            <td><code>token</code></td>
            <td>The Health Connect Provider Directory Requester and Provider Directory SHOULD support search using the HPI-O identifier as defined in the profile.</td>
      </tr>
      <tr>
            <td>HSP-O</td>
            <td><b>SHOULD</b></td>
            <td><code>token</code></td>
            <td>The Health Connect Provider Directory Requester and Provider Directory SHOULD support search using the HSP-O identifier as defined in the profile.</td>
      </tr>
      <tr>
            <td>ABN</td>
            <td><b>SHOULD</b></td>
            <td><code>token</code></td>
            <td>The Health Connect Provider Directory Requester and Provider Directory SHOULD support search using the ABN identifier as defined in the profile.</td>
      </tr>
      <tr>
            <td>ACN</td>
            <td><b>SHOULD</b></td>
            <td><code>token</code></td>
            <td>Use the standard `identifier` token form. Example: <code>?identifier=http://hl7.org.au/id/acn|123456789</code></td>
      </tr>
            <tr>
            <td>name (R4)</td>
            <td><b>SHOULD</b></td>
            <td><code>string</code></td>
            <td></td>
      </tr>
      <tr>
            <td>type (R4)</td>
            <td><b>SHOULD</b></td>
            <td><code>token</code></td>
            <td></td>
      </tr>
      <tr>
            <td>HPI-O + type</td>
            <td><b>SHOULD</b></td>
            <td><code>token</code> + <code>token</code></td>
            <td></td>
      </tr>
</tbody>
</table>

### Search include parameters

This implementation supports the following `_include` parameters when searching for Organization resources:

* `_include=Organization:partOf` - Include parent organizations referenced by the `partOf` element

### Search reverse include parameters

This implementation supports the following `_revinclude` parameters when searching for Organization resources:

* `_revinclude=Location:organization` - Include Location resources that reference this Organization through their `managingOrganization` element
* `_revinclude=Provenance:target` - Include Provenance resources that track changes to this Organization

#### Example usage

```text
GET /Organization/123?_revinclude=Location:organization&_revinclude=HealthcareService:organization
```

This query returns the Organization resource along with all associated Locations and HealthcareServices.