1  SAX.setDocumentLocator()
 2  SAX.startDocument()
 3  SAX.internalSubset(doc, , )
 4  SAX.elementDecl(doc, 4, ...)
 5  SAX.elementDecl(a, 3, ...)
 6  SAX.elementDecl(b, 3, ...)
 7  SAX.elementDecl(c, 3, ...)
 8  SAX.elementDecl(d, 3, ...)
 9  SAX.externalSubset(doc, , )
10  SAX.startElement(doc)
11  SAX.startElement(b)
12  SAX.characters(This, 4)
13  SAX.endElement(b)
14  SAX.startElement(c)
15  SAX.characters( is a valid document, 20)
16  SAX.endElement(c)
17  SAX.endElement(doc)
18  SAX.endDocument()