int len = elements.length();
for (; i < len && XmlChar.isWhitespace(elements.charAt(i)); i++) {
}
CharBuffer cb = new CharBuffer();
while (i < len) {
cb.clear();
for (; i < len && ! XmlChar.isWhitespace(elements.charAt(i)); i++)
cb.append(elements.charAt(i));
_preserve.put(cb.toString(), "true");