The concise variation of the beer engine has most of the recipe variables entered in a single field. Codes like m: for malt and h: for hops are used to code the recipe data. This version works nicely for recipes that are not meant to be altered, like clone beer recipes. Users can enter their own values for volume and similar batch variables.
Here's a quick overview of the codes.
og: 1.050
That's the original gravity data. It can be expessed as specific gravity (example: 1.050) or degrees plato (example: 12.5).
m: American two-row, 92, 2, 80
The m: field is for malts and grain adjuncts. The variables are name (example: American two-row), percentage of grist by gravity (example: 92%), color (example: 2 lovibond), and yield (example: 80%). Yield can be expressed as either a percentage or as specific gravity (example: 1.038).
s: Honey, 8, 10, 1.032
The s: field is for sugars and malt extract. In this example, 8 is the percentage of gravity, 10 is the color in lovibond, and 1.032 is the yield expressed as specific gravity.
ibu: 20
The ibu: field specifies the target bitterness.
h: Hallertau, 100, 4.5, 60
The h: field is for hops. The values, respectively, are the percentage of IBU from this addition (example: 100%, a single hop addition), alpha acid percentage (example, 4.5%), and boil time in minutes (example: 60 minutes).
y: ale
The y: is for yeast pitching, either ale or lager.
Additional option values are late boil additions (lb:) for spices and dry hopping (dry:).
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