# Uploading sample documents

> Upload representative sample documents to a Flow Extract node.

You can upload sample documents before or after you build the taxonomy. To upload sample documents, proceed as follows:

1. Once you have [added an Extract node](managing-extract-nodes.md#adding-an-extract-node-to-a-flow) to the Flow canvas, hover over the node.
2. Select **Open full view** from the toolbar.
3. In the **Definition** tab or the **Dataset** tab, select **Upload**.

   :::note
   The uploaded documents must be representative of your data and cover all possible variations.
   :::

4. Browse for the files.

   :::note
   The supported file formats are:
   * PDF
   * PNG
   * JPG or JPEG
   * TIF or TIFF
   * GIF
   :::

5. As soon as the documents are uploaded successfully, you can view all the documents under the **Dataset** tab, where you can:
   * Search by a document name.
   * Filter by the annotation status:
     * **Not started**
     * **In progress**
     * **Annotated**
     * **Annotated (Editing)**