Multisets and structure
I am now trying to revise the structure of the wiki page and make it a much more formal document. Flow structure has been improved and I have added multisets / bags as a feature of the language. From the document itself.
These are lsets with the added feature of multiplicity. This means that an element in an multiset can occur more than once but when you bons (bag cons) the value to the set it increases the occurance of that element by one.
This was spurred on by a discussion from #scheme on irc.freenode.net with bpt. I give thanks to all of the people who have read the document and have offered constructive criticism.