Example: If you were to add a column called recipient_date to an existing table in the standard release of the module, name it xx_recipient_date. The underscore in xx_ acts like a wild card in the DWD’s Search string feature, so a search for any columns that contain x_ returns any value that contains an x, such as tax_code. By using xx_, searches can be narrowed dramatically to only columns that contain xx, which should be nearly all customizations.