# Machine Learning Classifier Trainer

> **Machine Learning Classifier Trainer** writes validated data from Classification Station to AI Center dataset storage for creation or update of the Machine Learning Classification model. Prior to using this trainer, create a dataset folder on AI Center. The project and dataset folder names will be used to configure the trainer.

**Machine Learning Classifier Trainer** writes validated data from Classification Station to AI Center dataset storage for creation or update of the Machine Learning Classification model. Prior to using this trainer, create a dataset folder on AI Center. The project and dataset folder names will be used to configure the trainer.

Follow these steps to use the **Machine Learning Classifier Trainer**:

1. Use the **Taxonomy Manager** Wizard to define your document types and fields.
2. Drag and drop a **Machine Learning Classifier Trainer** activity in a **Train Classifiers Scope** activity.
3. In the **Machine Learning Classifier** wizard that automatically opens, provide the **ML Skill** and the **ApiKey** information. If you do not have a classifier ML Skill, go to step 5.
4. Select the **Get Capabilities** button. The wizard closes after this operation.
   :::note
   If you are creating the Machine Learning Classifier model for the first time (as opposed to trying to create a dataset to revise an existing ML model), skip steps 3 and 4 and just proceed to the next screen and manually enter the names of classification classes and map them to the Document Types declared in the Taxonomy Manager.
   :::
5. Enter a value for **Project** and **Dataset**.
   :::note
   This information pertains to the AI Center project and the dataset within that project to which you wish to send the validated classifier data.
   :::
6. Select the **Configure Extractors** option of the **Train Classifiers Scope**. A wizard is displayed.
7. The **Machine Learning Classifier Trainer** is now ready for configuration. For each document type, fill in the textboxes either manually or by selecting, from the available drop-down list, the correct classification field you wish to map to each field. The drop-down list contains all fields that the **Machine Learning Classifier Trainer**, using the **ML Skill** entered in the **Machine Learning Classifier** wizard, declares as classification capability.
8. To check if you are using the latest capabilities of the extractor, you can select the **Get or refresh classifier** capabilities which opens the **Machine Learning Classifier** wizard.
9. Selecting one of the options from a drop-down list automatically confirms that field.
10. As you pass the document through the workflow containing the **Machine Learning Classifier Trainer**, the document will get labeled and stored in the appropriate folder on AI Center.

    ![Screenshot describing the the Datasets page.](https://dev-assets.cms.uipath.com/assets/images/document-understanding/document-understanding-screenshot-describing-the-the-datasets-page-115967-ee799266-c1664d53.webp)

    ![Screenshot describing the the Datasets page.](https://dev-assets.cms.uipath.com/assets/images/document-understanding/document-understanding-screenshot-describing-the-the-datasets-page-116448-70ca81e0-d4946941.webp)