code: private Ref impOp() throws PageException {
  	Ref ref = eqvOp();
  	while (cfml.forwardIfCurrentAndNoWordAfter("imp")) {
  	    cfml.removeSpace();
  	    ref = new Imp(ref, eqvOp(), limited);
  	}
  	return ref;
      }
docs: Transfomiert eine Implication (imp) Operation. <br />
  EBNF:<br />
  <code>eqvOp {"imp" spaces eqvOp};</code>
  
  @return CFXD Element
  @throws PageException