When defining the indexing of documents in a processing configuration it can happen that e.g. a barcode is recognized with parenthesis as in (12)3456, but it would be necessary to remove these parenthesis. Currently, it is only possible to replace the entire value and not individual characters. A little extension to replace "(" by a space, remove it, or include regex functionalities would be very useful. Similarly, this applies to reading out text fields and removing hyphens in numbers, etc.