Definitions for "Instanceof"
Keywords:  boolean, swsl, mystring, lang, java
replaces reference on top of stack with a boolean.
Boolean operator that returns true if the left-hand operand is an instance of the class indicated by the right-hand operand. For example, ("mystring" instanceof java.lang.String) would return true.
A class membership molecule. (See: frame module, and the SWSL submission to the W3C)