protected  void addUserDefinedRules(State html,
    PageBuilder page) 
{
        // Ensure that while in < xml > tag, none of the other rules kick in.
        // For example < xml >< book >< title >hello< /title >< /book >< /xml > should not change the affect the title of the page.
        State xml = new State();
        html.addRule(new StateTransitionRule("xml", xml));
        // Useful properties
        html.addRule(new HtmlAttributesRule(page));         // attributes in < html > element
        html.addRule(new MetaTagRule(page));                // all < meta > tags
        html.addRule(new ParameterExtractingRule(page));    // < parameter > blocks
        html.addRule(new ContentBlockExtractingRule(page)); // < content > blocks
        // Capture properties written to documents by MS Office (author, version, company, etc).
        // Note: These properties are from the xml state, not the html state.
        xml.addRule(new MSOfficeDocumentPropertiesRule(page));
}

 public Page parse(char[] data) throws IOException 
{
        CharArray head = new CharArray(64);
        CharArray body = new CharArray(4096);
        TokenizedHTMLPage page = new TokenizedHTMLPage(data, body, head);
        HTMLProcessor processor = new HTMLProcessor(data, body);
        State html = processor.defaultState();
        // Core rules for SiteMesh to be functional.
        html.addRule(new HeadExtractingRule(head)); // contents of < head >
        html.addRule(new BodyTagRule(page, body)); // contents of < body >
        html.addRule(new TitleExtractingRule(page)); // the < title >
        html.addRule(new FramesetRule(page)); // if the page is a frameset
        // Additional rules - designed to be tweaked.
        addUserDefinedRules(html, page);
        processor.process();
        return page;
}