[ALUG] Numbered Lists

Hi folks, I'm trying to choose a good text markup language (e.g. markdown, restructured text etc). I want it to be able to deal with nested numbered lists. So something like this: # Dog # Kitten # Fish # Goldfish # Haddock # Elephant would produce something like this: 1. Dog 2. Kitten 3. Fish 3.1. Goldfish 3.2. Haddock 4. Elephant Anyone know a text format that would fit the bill? Many thanks, Richard