How do I have IDR read a certain number off an invoice image to populate a Routing Attribute field?

Summary:

We would like to have it recognize a number from a scanned invoice document (# will always be in the same format - the letter T followed by a fixed-length string of numeric digits) and then map it to a particular field on the AP invoice in the Oracle UI. I understand that Adaptive Learning is possible, but can we initially tell IDR to always map any character string matching this format to a certain field? (i.e., Routing Attribute 2)

Content (required):

We do not intend to use this # for any routing purposes, but it is an ID # that will make things much easier for our AP clerks if this # is pulled off the invoice and they do not need to search for it.