SAX.setDocumentLocator()
SAX.startDocument()
SAX.startElement(element, name='foo', xmlns:rng='http://example.org/ns/1', xmlns='http://example.org/ns/1')
SAX.characters(
  , 3)
SAX.startElement(empty)
SAX.endElement(empty)
SAX.characters(
, 1)
SAX.endElement(element)
SAX.endDocument()