StartEntitiesDetectionJob - Amazon Comprehend API Reference


Starts an asynchronous entity detection job for a collection of documents. Use the DescribeEntitiesDetectionJob operation to track the status of a job.

This API can be used for either standard entity detection or custom entity recognition. In order to be used for custom entity recognition, the optional EntityRecognizerArn must be used in order to provide access to the recognizer being used to detect the custom entity.

Request Syntax

{ "ClientRequestToken": "string", "DataAccessRoleArn": "string", "EntityRecognizerArn": "string", "InputDataConfig": { "DocumentReaderConfig": { "DocumentReadAction": "string", "DocumentReadMode": "string", "FeatureTypes": [ "string" ] }, "InputFormat": "string", "S3Uri": "string" }, "JobName": "string", "LanguageCode": "string", "OutputDataConfig": { "KmsKeyId": "string", "S3Uri": "string" }, "Tags": [ { "Key": "string", "Value": "string" } ], "VolumeKmsKeyId": "string", "VpcConfig": { "SecurityGroupIds": [ "string" ], "Subnets": [ "string" ] } }

Request Parameters

For information about the parameters that are common to all actions, see Common Parameters.

The request accepts the following data in JSON format.


A unique identifier for the request. If you don't set the client request token, Amazon Comprehend generates one.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 64.

Pattern: ^[a-zA-Z0-9-]+$

Required: No


The Amazon Resource Name (ARN) of the AWS Identity and Access Management (IAM) role that grants Amazon Comprehend read access to your input data. For more information, see

Type: String

Length Constraints: Minimum length of 20. Maximum length of 2048.

Pattern: arn:aws(-[^:]+)?:iam::[0-9]{12}:role/.+

Required: Yes


The Amazon Resource Name (ARN) that identifies the specific entity recognizer to be used by the StartEntitiesDetectionJob. This ARN is optional and is only used for a custom entity recognition job.

Type: String

Length Constraints: Maximum length of 256.

Pattern: arn:aws(-[^:]+)?:comprehend:[a-zA-Z0-9-]*:[0-9]{12}:entity-recognizer/[a-zA-Z0-9](-*[a-zA-Z0-9])*(/version/[a-zA-Z0-9](-*[a-zA-Z0-9])*)?

Required: No


Specifies the format and location of the input data for the job.

Type: InputDataConfig object

Required: Yes


The identifier of the job.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 256.

Pattern: ^([\p{L}\p{Z}\p{N}_.:/=+\-%@]*)$

Required: No


The language of the input documents. All documents must be in the same language. You can specify any of the languages supported by Amazon Comprehend. If custom entities recognition is used, this parameter is ignored and the language used for training the model is used instead.

Type: String

Valid Values: en | es | fr | de | it | pt | ar | hi | ja | ko | zh | zh-TW

Required: Yes


Specifies where to send the output files.

Type: OutputDataConfig object

Required: Yes


Tags to be associated with the entities detection job. A tag is a key-value pair that adds metadata to a resource used by Amazon Comprehend. For example, a tag with "Sales" as the key might be added to a resource to indicate its use by the sales department.

Type: Array of Tag objects

Required: No


ID for the AWS Key Management Service (KMS) key that Amazon Comprehend uses to encrypt data on the storage volume attached to the ML compute instance(s) that process the analysis job. The VolumeKmsKeyId can be either of the following formats:

  • KMS Key ID: "1234abcd-12ab-34cd-56ef-1234567890ab"

  • Amazon Resource Name (ARN) of a KMS Key: "arn:aws:kms:us-west-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab"

Type: String

Length Constraints: Maximum length of 2048.

Pattern: ^\p{ASCII}+$

Required: No


Configuration parameters for an optional private Virtual Private Cloud (VPC) containing the resources you are using for your entity detection job. For more information, see Amazon VPC.

Type: VpcConfig object

Required: No

Response Syntax

{ "JobArn": "string", "JobId": "string", "JobStatus": "string" }

Response Elements

If the action is successful, the service sends back an HTTP 200 response.

The following data is returned in JSON format by the service.


The Amazon Resource Name (ARN) of the entities detection job. It is a unique, fully qualified identifier for the job. It includes the AWS account, Region, and the job ID. The format of the ARN is as follows:


The following is an example job ARN:


Type: String

Length Constraints: Maximum length of 256.

Pattern: arn:aws(-[^:]+)?:comprehend:[a-zA-Z0-9-]*:[0-9]{12}:[a-zA-Z0-9-]{1,64}/[a-zA-Z0-9](-*[a-zA-Z0-9])*(/version/[a-zA-Z0-9](-*[a-zA-Z0-9])*)?


The identifier generated for the job. To get the status of job, use this identifier with the DescribeEntitiesDetectionJob operation.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 32.

Pattern: ^([\p{L}\p{Z}\p{N}_.:/=+\-%@]*)$


The status of the job.

  • SUBMITTED - The job has been received and is queued for processing.

  • IN_PROGRESS - Amazon Comprehend is processing the job.

  • COMPLETED - The job was successfully completed and the output is available.

  • FAILED - The job did not complete. To get details, use the DescribeEntitiesDetectionJob operation.

  • STOP_REQUESTED - Amazon Comprehend has received a stop request for the job and is processing the request.

  • STOPPED - The job was successfully stopped without completing.

Type: String



For information about the errors that are common to all actions, see Common Errors.


An internal server error occurred. Retry your request.

HTTP Status Code: 500


The request is invalid.

HTTP Status Code: 400


The KMS customer managed key (CMK) entered cannot be validated. Verify the key and re-enter it.

HTTP Status Code: 400


The specified resource ARN was not found. Check the ARN and try your request again.

HTTP Status Code: 400


The specified resource is not available. Check the resource and try your request again.

HTTP Status Code: 400


The number of requests exceeds the limit. Resubmit your request later.

HTTP Status Code: 400


The request contains more tags than can be associated with a resource (50 tags per resource). The maximum number of tags includes both existing tags and those included in your current request.

HTTP Status Code: 400

See Also

For more information about using this API in one of the language-specific AWS SDKs, see the following: