This function allows you to check the contents of a data field for duplicates and remove them. To do this, the attributes stored in this data field must be separated by a delimiter, such as a semicolon. Optionally, these attributes can also be sorted alphabetically. Example: 'A;C;A;B;C' becomes 'A;C;B'. And if the result is to be sorted as well, it becomes 'A;B;C'.