Measures the enzymatic activity (Lintner). High DP malts (like North American 6-row) are essential if you are using a lot of un-malted adjuncts like corn or rice.

Often listed as "Fine Grind, Dry Basis" (FGDB). It tells you the maximum amount of soluble material you can get from the grain. Higher extract values lead to better profitability and yield.

Modern "deep" features also track how the malt affects the long-term flavor of your finished product.