Hi Sunil,
We can Subset data that contains alphanumeric characters like you mentioned. For the letters like é and ç the datatype holding the data would most likely be a nvarchar because these are unicode characters.
If you would like TDM to support the Image format for Subset/Extraction of data from the source DBMS/flat files, please create an 'Idea' post for it on this community page.
Please also include the impact this is having for your project, how soon you would need it, and the potential business impact if it is not provided. You and other community users will be able to 'vote' for this enhancement request. It will be reviewed by product managers at frequent intervals who will decide if the enhancement will be added to the product and when. You will be notified of the enhancement request's progress by the Idea post being marked as 'Under Review', 'Currently Planned' , or 'Delivered' by CA.This is our formal way of documenting enhancement requests and a lot of them really do get added to the product, so I highly recommend writing a post.
Best regards,
Taylor