A DESCRIPTION OF THE REQUEST :
There are no MultiSet or MultiMap interface specifications. Using the standard Map/Set interface is a bit clumsy, despite there capability to emulate a Multi-variant (as mentioned in online Map doc). I would be happy if just the MultiMap and MultiSet interfaces were specified since I would be implementating my own. I am less concerned about actual implementations (hash-based,tree-based, sorted,linked), though of course, some might scream if interfaces were published without at least a couple implementations ;-). I suppose an AbstractMultiMap and AbstractMultiSet may appease the masses.


JUSTIFICATION :
Though prior bug reports on MultiMap's and MultiSets have been shot down in the past because they are apparently "rarely" used according to Map documentation and also rarely requested, I find that fairly hard to believe. MultiMap's and MultiSet's happen to make fantastic adapters for relational databases or object oriented databases (like the custom one we use at my company).