else if (name.equals (Literals.NOT_ISCOLLECTION))
result = new NotIsCollectionExpression (e, getRequestedResourcePool());
else if (name.equals (Literals.ISDEFINED))
result = new IsDefinedExpression (e, getRequestedResourcePool());
else if (name.equals (Literals.NOT_ISDEFINED))
result = new NotIsDefinedExpression (e, getRequestedResourcePool());
else