Evaluate the current predicate with this binary operator
Boolean - class com.japisoft.xpath.function.basic.Boolean.
function converts its argument to a boolean as follows:
a number is true if and only if it is neither positive or negative zero nor NaN
a node-set is true if and only if it is non-empty
a string is true if and only if its length is non-zero
an object of a type other than the four basic types is converted to a boolean in a way that is dependent on that type
Boolean() -
Constructor for class com.japisoft.xpath.function.basic.Boolean