}

    /**
     * Encodes the value of an attribute.
     *
     * @param s
     *            The attribute value.
     * @return The encoded attribute value.
     */
    public static String encodeAttrQuot(final String s) {
        if (s == null) {
            return null;
        }
        final char[] content = s.toCharArray();
        final StringBuilder buf = new StringBuilder(s.length() + 100);