private static final Pattern HTML_ELEMENT = Pattern.compile("(?s)<\\\\?[^<]+?>");
    private static final Pattern ELEMENT_ATTRIBUTE = Pattern.compile("(?s)\\w+(\\s*=\\s*('.*?')|(\".*?\"))?");
    private static final Pattern END_ATTRIBUTE_NAME = Pattern.compile("=|(\\s)|(/>)|>");
    private static final Pattern ATTRIBUTE_SEPARATOR = Pattern.compile("\\s*=\\s*");
    private static final Pattern END_ELEMENT_NAME = Pattern.compile("\\s+|(/>)|>");