SAX.setDocumentLocator()
SAX.startDocument()
SAX.internalSubset(doc, , )
SAX.entityDecl(ent1, 1, (null), (null), <elem/>)
SAX.getEntity(ent1)
SAX.entityDecl(ent2, 1, (null), (null), <ns:elem/>)
SAX.getEntity(ent2)
SAX.externalSubset(doc, , )
SAX.startElement(doc)
SAX.characters(
    , 5)
SAX.startElement(a, xmlns='urn:a')
SAX.getEntity(ent1)
SAX.startElement(elem)
SAX.endElement(elem)
SAX.reference(ent1)
SAX.endElement(a)
SAX.characters(
    , 5)
SAX.startElement(b, xmlns='urn:b')
SAX.getEntity(ent1)
SAX.startElement(elem)
SAX.endElement(elem)
SAX.reference(ent1)
SAX.endElement(b)
SAX.characters(
    , 5)
SAX.startElement(a, xmlns:ns='urn:a')
SAX.getEntity(ent2)
SAX.startElement(ns:elem)
SAX.endElement(ns:elem)
SAX.reference(ent2)
SAX.endElement(a)
SAX.characters(
    , 5)
SAX.startElement(b, xmlns:ns='urn:b')
SAX.getEntity(ent2)
SAX.startElement(ns:elem)
SAX.endElement(ns:elem)
SAX.reference(ent2)
SAX.endElement(b)
SAX.characters(
, 1)
SAX.endElement(doc)
SAX.endDocument()