Data Tags within PDF

Hi

I am looking for some information/documentation on the ability to "Tag" variables within a pdf for output by Optio.
I have searched the JDE list and Knowledge garden but can find no information.
Regards
Noel
OW 8.0 sp21
Optio (design studio 7.8)

Not sure if this is the same as how Create!Form works, but we had to add the line

UBEPrintDataItems=1

to the [UBE] stanza of JDE.INI, on both clients and server.