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Standardizing values in cells with autocompletion

When editing a cell in a column which semantic type is based on a dictionary, the application will automatically suggest values that are part of this dictionary as you type, to ensure that the whole column follows the same standard.

In this example, you are working on a dataset containing customer data, including US state codes. Because all the occurrences of Texas have not been correctly entered in the two-letter code format, part of the data is considered invalid in the State column, as shown by the quality bar. You are going to isolate the rows containing errors, edit one of the cells with autocompletion, and apply the change to all identical cells to fix the whole column in a single operation.

Before you begin

The autocompletion menu is only available if the semantic type of the column is based on a dictionary of values present by default in Talend Data Preparation, or that you have created using Talend Dictionary Service. For more information on how to create custom semantic types, or edit the existing ones, see Enriching the semantic types libraries.


  1. In the State column, click the orange part of the quality bar and click Select rows with invalid values for State to apply a filter and isolate the rows with Texas.
  2. In the State column, double-click one of the occurrences of Texas.
    You can now edit the content of the cell. When you delete the previous value, a drop-down list opens, suggesting all the values that are part of the US State Code dictionary-based semantic type, sorted alphabetically.
  3. Because the code for Texas is not part of the first results that are displayed, start typing Tto see which results come up.
    The suggestions will become more accurate as you type. But if the expected value can already be found from the original list, you can directly select it.
  4. From this refined list, select the state code that corresponds to Texas, namely TX.
  5. Select the check box Apply to all cells with this value that appears once you have finished typing or selecting a value.
    The change you have made in this cell will now also apply to the other incorrect values.
  6. Click Submit.


Thanks to the suggestions, you are ensured that the new value you applied is in the correct format. All the other incorrect occurrences of Texas have been replaced by the correct TX state code in a single operation. The quality bar now indicates that all the data in the State column is valid.

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