The original roundup (at ILM) allowed issues to be cross
referenced with special cookies. For example, issue
text might have something like (see @99) in it indicating 
a cross reference to issue 99 in the same roundup database.
In the web interface this was displayed as a link to that
issue. In addition cross referencing was used to indicate
duplicate issues by adding to the subject (but leaving
the duplicate issue).

jimhourihan@earthlink.net
jim @at@ tweakfilms .dot. COM