Expression4J (Math Expression Parser) is a java framework used to manage mathematic expression stored in String object like "f(x,b)=2*x-cos(b)" or "g(x,y)=f(y,x)*-2". Expression gramar can be define by user (add new operator or type ...)
The Frame Processing Language (FPL) is an XML language based on the Frame Technology by Paul G. Bassett as described in his book Framing Software Reuse: lessons from the real world.
FPL is implemented in Java using JDOM,Saxon and Jakarta-oro.