|  | 
| --- |
| **This software is not currently supported by Amazon Mechanical Turk** The Amazon Mechanical Turk Command Line Tools (CLT) are not currently maintained by Amazon Mechanical Turk. If you would still like to use Amazon Mechanical Turk from the command line, use the `mturk` command in the AWS Command Line Interface (CLI). For more information, see the `mturk` section of the [ AWS CLI Command Reference ](https://docs.aws.amazon.com/cli/latest/reference/mturk/index.html).  | 

 

# Document History
<a name="WhatsNew"></a>

This Document History describes the important changes to the documentation.
+ **Current product version: **2017-01-17 
+ **Latest documentation update: **July 17, 2014


| Major Changes | Description | Release Date | 
| --- | --- | --- | 
| New QualificationRequirement Comparators | The following new comparators were added to the QualificationRequirement data structure: DoesNotExist, In, and NotIn. For more information about these new comparators, see [QualificationRequirement](http://docs.aws.amazon.com/AWSMechTurk/latest/AWSMturkAPI/ApiReference_QualificationRequirementDataStructureArticle.html) in the Amazon Mechanical Turk API Reference.  | July 17, 2014 | 
| New Mechanical Turk HITLayout | New for this release is the ability to create a HITLayout in the Amazon Mechanical Turk Requester UI that can be used with the Mechanical Turk API. A HITLayout is a reusable template used to provide Human Intelligence Task (HIT) question data for [CreateHIT](http://docs.aws.amazon.com/AWSMechTurk/latest/AWSMturkAPI/ApiReference_CreateHITOperation.html). For more information, see [HITLayout](http://docs.aws.amazon.com/AWSMechTurk/latest/AWSMturkAPI/ApiReference_HITLayoutArticle.html).  | March 29, 2012 | 
| Mechanical Turk Review Policies | Amazon Mechanical Turk has added Review Policies that you can use to evaluate Worker submissions against a defined set of criteria. For more information, see [Review Policies](http://docs.aws.amazon.com/AWSMechTurk/latest/AWSMturkAPI/ApiReference_ReviewPoliciesArticle.html).  | December 1, 2011 | 
| Technical documents reorganized | The API reference and the command line tool reference have been split out of the Amazon Mechanical Turk Developer Guide. Now, on the documentation landing page, [Amazon Mechanical Turk Documentation](http://aws.amazon.com/documentation/mturk/) you can select the document you want to view. When viewing the documents online, the links in one document will take you, when appropriate, to one of the other guides. | September 16, 2009 |