Labeling Text Classification Data

After a project is created, you will be redirected to the new-version ExeML and the project starts to run. When the data labeling phase changes to Awaiting operation, manually confirm data labeling in the dataset. You can also add or delete data in the dataset and modify labels.

Figure 1 Data labeling status

Double-click Label Data and click Instance Details. The data labeling page is displayed.

Data Labeling for Text Classification

Select a text to be labeled in Labeling Objects and click different labels in the Label Set area to label the text.
You can add only one label for a text object.
After confirming the file label, click Save Current Page in the lower right corner to save the labeling.
If a large number of objects are included in Labeling Objects, the page turning icon is displayed in the lower part of the area. After labeling objects on this page, click Save Current Page before you turn to the next page. If you turn pages before saving the labellings, the labeling information on the previous page will be lost. You need to re-label for text data.

Figure 2 Data labeling - text classification

Adding or Deleting Data

In an ExeML project, the data source is the OBS directory corresponding to the input path of the dataset. If the data in the directory cannot meet your requirements, add or delete data on the ExeML page of ModelArts.

Adding a file
On the Unlabeled tab, click Add data in the top left corner. In the displayed dialog box, select a local file and upload it.

The format of the file to be uploaded must meet requirement on datasets of the text classification type.
Deleting a text object
On the Labeled or Unlabeled tab page, select a text object to be deleted and click Delete in the upper left corner. In the dialog box that is displayed, confirm the deletion information and click OK.

On the Labeled tab page, you can tick Select Current Page and click Delete to delete all text objects and their labeling information on the current page.

Modifying Labeled Data

For labeled text data, only labels of the text object can be deleted. To delete a label, go to the Labeled tab, locate the label name area, and click the cross icon next to the label. After the label is deleted, the text object is displayed on the Unlabeled tab page.

Figure 3 Deleting a labeled text

Modifying a Label

After an ExeML project for text classification is created, you can modify labels based on service changes, including label adding, modification, and deletion.

Adding a label
On the Unlabeled tab, click the plus sign (+) on the right of Label Set. In the Add Label dialog box that appears, set Label Name and Label Color, and click OK.
Modifying a label
On the Labeled tab, locate the All Labels area, and click the edit button in the Operation column of the label you want to change. In the Modify Label dialog box, set Label Name and Label Color and click OK.
Deleting a label
In the lower part of All labels on the Labeled tab page, select a label to be deleted and click the deletion icon in the Operation column. In the displayed Delete dialog box, select Delete label or Delete the label and objects with only the label, and click OK.

The deleted labels cannot be recovered. Exercise caution when performing this operation.

Resuming Workflow Execution

After confirming data labeling, return back to the new-version ExeML. Click Next. Then, the workflow continues to run in sequence until all phases are executed.

Figure 4 Resuming the workflow execution