# IndexDocuments
<a name="API_IndexDocuments"></a>

## Description
<a name="API_IndexDocuments_Description"></a>

Tells the search domain to start indexing its documents using the latest indexing options. This operation must be invoked to activate options whose [OptionStatus](API_OptionStatus.md) is `RequiresIndexDocuments`.

## Request Parameters
<a name="API_IndexDocuments_RequestParameters"></a>

 For information about the common parameters that all actions use, see [Common Parameters](CommonParameters.md). 

 **DomainName**   
A string that represents the name of a domain. Domain names are unique across the domains owned by an account within an AWS region. Domain names start with a letter or number and can contain the following characters: a-z (lowercase), 0-9, and - (hyphen).  
Type: String  
 Length constraints: Minimum length of 3. Maximum length of 28.   
 Required: Yes 

## Response Elements
<a name="API_IndexDocuments_ResponseElements"></a>

 The following element is returned in a structure named `IndexDocumentsResult`. 

 **FieldNames**   
The names of the fields that are currently being indexed.  
Type: String list   
 Length constraints: Minimum length of 1. Maximum length of 64. 

## Errors
<a name="API_IndexDocuments_Errors"></a>

 For information about the errors that are common to all actions, see [Common Errors](CommonErrors.md). 

 **Base**   
An error occurred while processing the request.  
 HTTP Status Code: 400

 **Internal**   
An internal error occurred while processing the request. If this problem persists, report an issue from the [Service Health Dashboard](http://status.aws.amazon.com/).  
 HTTP Status Code: 500

 **ResourceNotFound**   
The request was rejected because it attempted to reference a resource that does not exist.  
 HTTP Status Code: 409