Requisition DFF to be filled by Auto complete rules by copying from Standard field values

Summary:

We have a requirement to display the standard "Job" field to our External and Internal Portal, but as per latest patch 23D , Oracle has not yet enabled this field for displaying it to career portals although other fields like Job Family, Job Function and Grade has been enabled. So, we have created a custom DFF "Job Classification" on the Requisition page in which we are currently asking the Recruiter to manually copy the value of "Job" from standard field and paste it to custom DFF "Job Classification" field. Is it possible to write an Autocomplete rule on the Requisition