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Manage classes

The Resources tab

The Resources tab allows you to manage the classes of information to extract.

It is composed of the following panels:

  • Resources displays a concise view of the defined classes, possibly divided into groups.
  • Edit Classes is the editing area showing the classes details.

The Resources panel

Use this panel to manage classes and groups of classes.

Create new classes

To create new classes:

  1. Select Create class on the toolbar.
  2. In Groups, select the group to which the new class belongs. Ungrouped classes is the default group.
  3. In the Classes field:

    • Type the name of a new class and press Enter.
    • If you want to create additional classes, repeat the step above as many times as needed.
  4. Select Create to confirm.

Create a group

To create a group, select Create group on the toolbar.

Rename a group

To rename a group (except for Ungrouped classes):

  • Select a group, then select the pencil icon in the right part of the box.


  • Hover over a group name, then select the pencil icon .

Delete a group

To delete a group, select it, then select Delete group on the toolbar.

Multiple selections using CTRL+CLICK or SHIFT+CLICK are allowed.

Remove all the classes from a group

To remove all classes from a group:

  1. Select the group.
  2. Select Ungroup classes on the toolbar.
  3. Select Confirm.


    When you ungroup all classes from a group, the latter will not be deleted, but will remain empty for new classes to group.

Create metadata class

To create metadata class:

  1. Select Create metadata on the toolbar.
  2. In the Create metadata class, select the group, type the name of a class, then press Enter.
  3. You can create more classes repeating the step above. When done, select Create.

Export a class set in JSON format

To Export a class set in JSON format:

  1. Select Export class set on the toolbar.
  2. In the Export resources window, type the name in Filename or confirm the suggested one, then select Export.
  3. In the Available for download area or in the notification in the lower right corner, select Download.

The Edit Classes panel

Alternative visualizations

In Edit Classes you can visualize classes as cards or as rows of a table.
To switch between visualizations, select Show table view and Show card view on the toolbar.


In card view, to change the sort order of the classes, select Sort on the toolbar and then choose the desired option from the drop-down menu.

In table view, to sort the entries according to a specific item, select a column header.


The items sorting is performed within the classes.

Edit class attributes

  • To change the class name, hover over the class box, select the pencil icon then edit the name.

  • To change the class color, click the colored rectangle and choose the new color.


    The color code is useful to quickly distinguish between classes.

  • To change the short form of the class name, click on the field starting with a dollar sign and edit the value.


    Name abbreviations are useful in compact views and long lists.


    Short forms that are considered as keywords (for example the entities and tokens short form as CAT, ANN, NPH, GEO, EXT, and so on) are not allowed.

  • To turn on and off the favorite flag, select the Favorite / toggle switch.


    The favorite flag helps, when you have many classes, to choose from the list: favorite classes will appear first in the list when annotating a portion of a text.

  • To exclude or include the class extraction, select the Extraction / toggle switch.


    Some classes or documents may have more or less relevance in the training, so to set a better strategy you can exclude or include their extraction in the experiments.

Delete a class

To delete a class, select it and choose Delete class on the toolbar.


It is not allowed to delete a class when it is the only one defined in the project.

Put classes in a group

To put one or more classes in a group:

  1. Select the classes to be included in the group. Multiple selections with Ctrl-Click and Shift-Click are allowed.
  2. Select Group classes on the toolbar.
  3. In the dialog box, type the group name. As you type, the names of existing groups are suggested as possible choices. If no group corresponds to what you typed, you will be offered to create one.
  4. Select Group classes.


When you select or deselect classes in one panel, they are selected or deselected in the other as well, so you can use the two panels interchangeably for these operations.

Remove classes from their groups

To remove classes from their groups:

  1. Select the classes to be removed from the group. Multiple selections with Ctrl-Click and Shift-Click are allowed.
  2. Select Ungroup classes on the toolbar.
  3. Select Confirm.

Check the annotations for a class

To check the annotations for a class, watch:

  • Annotations item, if in card view.


  • The Annotations column, if in table view.

To see the top ten annotations values for a class, when in card view, select the down arrow .

To hide the top ten annotations values for a class, when in card view, select the up arrow .