s.append(")");
} else if (e instanceof BuiltInCall) {
BuiltInCall b = (BuiltInCall) e;
appendCall(s, b.getName(), b.getArguements());
} else if (e instanceof FunctionCall) {
FunctionCall f = (FunctionCall) e;
appendCall(s, f.getName().getUnicodeString(), f.getArguements());
} else if (e instanceof LiteralExpression) {
appendLiteralExpression(s, (LiteralExpression) e);
} else if (e instanceof UriRefExpression) {
s.append(((UriRefExpression) e).getUriRef().toString());
}