# Update

The `Update` action uses an appropriate connector to update the metadata of documents in a repository.

Type: Asynchronous

Parameter Name | Description | Required
--- | --- | ---
AUTN_GROUP | The connector group to send the action to. | Yes
`Config` | An optional Base64 encoded configuration file, to override the connector configuration file. | No
`IdentifiersXML` | The `IdentifiersXML` parameter specifies the identifiers of the documents to update. It also specifies the metadata to update for each document. The data must be provided in XML format as below:
    <IdentifiersXML>
      <identifier value="[AUTN_IDENTIFIER1]">
        <metadata name="[CustomField1]"  value="[CustomFieldValue1_1]"/>
        <metadata name="[CustomField1]"  value="[CustomFieldValue1_2]"/>
        <!-- ... -->
      </identifier>
      <identifier value="[AUTN_IDENTIFIER2]">
        <metadata name="[CustomField1]"  value="[CustomFieldValue2_1]"/>
        <!-- ... -->
      </identifier>
      <!-- ... -->
    </IdentifiersXML>
| Yes

## Example

    /action=fetch&fetchaction=Update
                          &AUTN_GROUP=ConnectorGroup
    		      [&config=<Base64_Config>]
    		       &identifiersXML=<Identifiers_XML>

## Response

The `update` fetch action is asynchronous, so you will receive a token in response to the request. Use the token with the `QueueInfo` action to check the status of the action.

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