What's a UOM intraclass conversion?

A UOM intraclass conversion specifies the conversion between a unit of measure, the From UOM, and the base unit of measure of the same class.

For example, suppose you're considering converting cases of water into a base unit of each bottle of water. The unit of measure class is Quantity. The From UOM is case (CS). The base unit of measure is each (EA). The conversion is 24, to specify that 1 CS = 24 EA.