As discussed before, a variable value can be appended a '|' and the name of a BEE Conversion, which convert the value into another value to be used in the expression instead of the original value.

The Conversion name can be optionally followed by a ':' and an argument string.  If multiple arguments are required, it will be in a comma-delimited string format.  All occurrences of "@value" in the argument string will be replaced by the input string.

There are two types of BEE Conversion: Intrinsic Conversions (built-in to the BEE system) and User-defined Conversions (defined in the code as a function).  The latter take precedence.  That is if a User-defined Conversion has the same name as one of the Intrinsic Conversions, the User-defined Conversion will be used instead.