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Container for the parameters to the CreateHIT operation.
CreateHIT operation creates a new Human Intelligence Task (HIT).
The new HIT is made available for Workers to find and accept on the Amazon Mechanical
This operation allows you to specify a new HIT by passing in values for the properties
of the HIT, such as its title, reward amount and number of assignments. When you pass
these values to
CreateHIT, a new HIT is created for you, with a new
The HITTypeID can be used to create additional HITs in the future without needing
to specify common parameters such as the title, description and reward amount each
An alternative way to create HITs is to first generate a HITTypeID using the
operation and then call the
CreateHITWithHITType operation. This is the
recommended best practice for Requesters who are creating large numbers of HITs.
CreateHIT also supports several ways to provide question data: by providing a value
Question parameter that fully specifies the contents of the HIT,
or by providing a
HitLayoutId and associated
If a HIT is created with 10 or more maximum assignments, there is an additional fee. For more information, see Amazon Mechanical Turk Pricing.
public class CreateHITRequest : AmazonMTurkRequest IAmazonWebServiceRequest
The CreateHITRequest type exposes the following members
Gets and sets the property AssignmentDurationInSeconds.
The amount of time, in seconds, that a Worker has to complete the HIT after accepting it. If a Worker does not complete the assignment within the specified duration, the assignment is considered abandoned. If the HIT is still active (that is, its lifetime has not elapsed), the assignment becomes available for other users to find and accept.
Gets and sets the property AssignmentReviewPolicy.
The Assignment-level Review Policy applies to the assignments under the HIT. You can specify for Mechanical Turk to take various actions based on the policy.
Gets and sets the property AutoApprovalDelayInSeconds.
The number of seconds after an assignment for the HIT has been submitted, after which the assignment is considered Approved automatically unless the Requester explicitly rejects it.
Gets and sets the property Description.
A general description of the HIT. A description includes detailed information about the kind of task the HIT contains. On the Amazon Mechanical Turk web site, the HIT description appears in the expanded view of search results, and in the HIT and assignment screens. A good description gives the user enough information to evaluate the HIT before accepting it.
Gets and sets the property HITLayoutId.
The HITLayoutId allows you to use a pre-existing HIT design with placeholder values and create an additional HIT by providing those values as HITLayoutParameters.
Constraints: Either a Question parameter or a HITLayoutId parameter must be provided.
Gets and sets the property HITLayoutParameters.
If the HITLayoutId is provided, any placeholder values must be filled in with values using the HITLayoutParameter structure. For more information, see HITLayout.
Gets and sets the property HITReviewPolicy.
The HIT-level Review Policy applies to the HIT. You can specify for Mechanical Turk to take various actions based on the policy.
Gets and sets the property Keywords.
One or more words or phrases that describe the HIT, separated by commas. These words are used in searches to find HITs.
Gets and sets the property LifetimeInSeconds.
An amount of time, in seconds, after which the HIT is no longer available for users to accept. After the lifetime of the HIT elapses, the HIT no longer appears in HIT searches, even if not all of the assignments for the HIT have been accepted.
Gets and sets the property MaxAssignments.
The number of times the HIT can be accepted and completed before the HIT becomes unavailable.
Gets and sets the property QualificationRequirements.
Conditions that a Worker's Qualifications must meet in order to accept the HIT. A
HIT can have between zero and ten Qualification requirements. All requirements must
be met in order for a Worker to accept the HIT. Additionally, other actions can be
restricted using the
Gets and sets the property Question.
The data the person completing the HIT uses to produce the results.
Constraints: Must be a QuestionForm data structure, an ExternalQuestion data structure, or an HTMLQuestion data structure. The XML question data must not be larger than 64 kilobytes (65,535 bytes) in size, including whitespace.
Either a Question parameter or a HITLayoutId parameter must be provided.
Gets and sets the property RequesterAnnotation.
An arbitrary data field. The RequesterAnnotation parameter lets your application attach arbitrary data to the HIT for tracking purposes. For example, this parameter could be an identifier internal to the Requester's application that corresponds with the HIT.
The RequesterAnnotation parameter for a HIT is only visible to the Requester who created the HIT. It is not shown to the Worker, or any other Requester.
The RequesterAnnotation parameter may be different for each HIT you submit. It does not affect how your HITs are grouped.
Gets and sets the property Reward.
The amount of money the Requester will pay a Worker for successfully completing the HIT.
Gets and sets the property Title.
The title of the HIT. A title should be short and descriptive about the kind of task the HIT contains. On the Amazon Mechanical Turk web site, the HIT title appears in search results, and everywhere the HIT is mentioned.
Gets and sets the property UniqueRequestToken.
A unique identifier for this request which allows you to retry the call on error without creating duplicate HITs. This is useful in cases such as network timeouts where it is unclear whether or not the call succeeded on the server. If the HIT already exists in the system from a previous call using the same UniqueRequestToken, subsequent calls will return a AWS.MechanicalTurk.HitAlreadyExists error with a message containing the HITId.
Note: It is your responsibility to ensure uniqueness of the token. The unique token expires after 24 hours. Subsequent calls using the same UniqueRequestToken made after the 24 hour limit could create duplicate HITs.
Supported in: 1.3
Supported in: 4.5, 4.0, 3.5
Portable Class Library:
Supported in: Windows Store Apps
Supported in: Windows Phone 8.1
Supported in: Xamarin Android
Supported in: Xamarin iOS (Unified)
Supported in: Xamarin.Forms