SAX.setDocumentLocator()
SAX.startDocument()
SAX.internalSubset(root, , )
SAX.attributeDecl(foo, xml:lang, 1, 1, eng, ...)
SAX.externalSubset(root, , )
SAX.startElement(root)
SAX.characters(
  , 3)
SAX.startElement(foo, xml:lang='ger')
SAX.characters(Ja, 2)
SAX.endElement(foo)
SAX.characters(
, 1)
SAX.endElement(root)
SAX.endDocument()