What are the limits on the use of documents obtained on discovery?

In Goodman v. Rossi, Morden A.C.J.O. expressly limited his ruling on the use of documents obtained on discovery stating at p. 365: I say at the outset that, because this is a case concerned with a document obtained on discovery, and not information obtained on examination for discovery, I shall confine this discussion to documents obtained on discovery. It may be that information obtained on examination for discovery does not raise exactly the same issues. I shall discuss it briefly later.