crowd-classifier - Amazon SageMaker


A widget for classifying non-image content, such as audio, video, or text.

The following is an example of an HTML worker task template built using crowd-classifier. This example uses the Liquid template language to automate:

  • Label categories in the categories parameter

  • The objects that are being classified in the classification-target parameter.

Copy the following code and save it in a file with the extenion .html. Open the file in any browser to preview and interact with this template.

<script src=""></script> <crowd-form> <crowd-classifier name="category" categories="{{ task.input.labels | to_json | escape }}" header="What type of a document is this?" > <classification-target> <iframe style="width: 100%; height: 600px;" src="{{ task.input.taskObject | grant_read_access }}" type="application/pdf"></iframe> </classification-target> <full-instructions header="Document Classification Instructions"> <p>Read the task carefully and inspect the document.</p> <p>Choose the appropriate label that best suits the document.</p> </full-instructions> <short-instructions> Please choose the correct category for the document </short-instructions> </crowd-classifier> </crowd-form>


The following attributes are supported by this element.


A JSON formatted array of strings, each of which is a category that a worker can assign to the text. You should include "other" as a category, otherwise the worker my not be able to provide an answer.


The text to display above the image. This is typically a question or simple instruction for the worker.


The name of this widget. It is used as a key for the widget's input in the form output.

Element Hierarchy

This element has the following parent and child elements.


The following regions are supported by this element.


The content to be classified by the worker. This can be plain text or HTML. Examples of how the HTML can be used include but are not limited to embedding a video or audio player, embedding a PDF, or performing a comparison of two or more images.


General instructions about how to do text classification.


Important task-specific instructions that are displayed in a prominent place.


The output of this element is an object using the specified name value as a property name, and a string from the categories as the property's value.

Example : Sample Element Outputs

The following is a sample of output from this element.

[ { "<name>": { "label": "<value>" } } ]

See Also

For more information, see the following.