Bukkit

example.yml:

SomeName:    #<---- You can give any name here, so long as it's unique.
  Recipe:         #<---- Specify the recipe
  - 3, 3, 3         #<---- Define the input
  - 3, 0, 3
  - 3, 3, 3
  Output:
  - 1
  - 2
  - 3  #<---- Define the output, up to 9 different items separated by comma

Test2:
  Recipe:
  - 1, 1, 1
  - 1, 1, 1
  - 1, 1, 1
  Output:
  - 35:1*5 <--#<--- You can define it as itemID:damageValue*value
  - 35*2  <-- Giving out just 2 wool
  - 35:3   #<--- You don't need to specify the output amount
Test4:
  Recipe:
  - 1, 1, 1
  Output:
  - "35:15"

SingleInput
  Recipe:
  - "35:15" <-- #There is a quirk in the way yaml works. If you want to only specify the id and damage value, you need to put quotes around it.
  Output:
  - "35:14"

Test5:
  Recipe:
  - 0, 1, 0
  - 1, 1, 1
  - 0, 1, 0
  Output:
  - 1

RandomLargeRecipe:
  Recipe:
  - 1, 1, 1, 1, 1
  - 1, 1, 1, 1, 1
  - 1, 1, 1, 1, 1
  - 1, 1, 1, 1, 1
  Output:
  - 35:0*1
  - 35:1*2
  - 35:2*3
  - 35:3*4
  - 35:4*50
  - 35:5*51
  - 35:6*52
  - 35:7*64
  - 5*5