Roger:
You're right. I wrote the song tongue-in-cheek, but it almost works as a real one. Wonder if this means folksingers really -did- have a system! Just figured that my song goes pretty well to Behan's "Patriot Game." According to the database, this tune is also called, "One Morning in May." :) So, new rule:

Any 'traditional' tune may be used if and only if it is named for one of the attributes in the remainder of this list.

Jennifer