Actually, two topics mention the unload method; the other is "Derby JDBC driver" in the Developer's Guide. Attaching DERBY-5384.diff, DERBY-5384.stat, and DERBY-5384.zip, with these changes:
Looks good to me. Thanks, Kim. +1
Thanks very much, Rick!
Committed patch DERBY-5384.diff to documentation trunk at revision 1158368.
Merged to 10.8 doc branch at revision 1158391.
Issue was resolved several months ago, so closing.