public interface XYZURLGenerator extends XYURLGenerator {

    /**
     * Generates a URL for a particular item within a series. As a guideline, 
     * the URL should be valid within the context of an XHTML 1.0 document.
     *
     * @param dataset  the dataset (<code>null</code> not permitted).
     * @param series  the series index (zero-based).
     * @param item  the item index (zero-based).
     *
     * @return A string containing the generated URL.
     */
    public String generateURL(XYZDataset dataset, int series, int item);