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import nu.xom.*;
import java.math.BigInteger;
public class ValidFibonacci {
public static void main(String[] args) {
BigInteger low = BigInteger.ONE;
BigInteger high = BigInteger.ONE;
Element root = new Element("Fibonacci_Numbers");
for (int i = 1; i <= 10; i++) {
Element fibonacci = new Element("fibonacci");
fibonacci.appendChild(low.toString());
Attribute index = new Attribute("index", String.valueOf(i));
fibonacci.addAttribute(index);
root.appendChild(fibonacci);
BigInteger temp = high;
high = high.add(low);
low = temp;
}
Document doc = new Document(root);
DocType doctype = new DocType("Fibonacci_Numbers", "fibonacci.dtd");
doc.insertChild(doctype, 0);
System.out.println(doc.toXML());
}
}
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