This might need need to be expanded upon -- apologies if this is stating the obvious:
@Version (togther with its Lotusscript and Java counterparts) will return the version of Notes
currently being used. With that in mind, it's nice 'n 'easy to add a computed-when-composed field to the form(s) used by your data so that this stuff is stored when new documents are created going forward.
What this will
not address is figuring out what version of Notes was used in creating data already in your applications -- that's not going to be readily available.
HTH
--
http://www.benpoole.com