http://java.sun.com/xml/jaxp/dist/1.1/docs/tutorial/overview/1_xml.html
     Since identifying the data gives you some sense of what means (how
     to interpret it, what you should do with it), ...
A word is missing. You need to insert "it" before "means".

http://java.sun.com/xml/jaxp/dist/1.1/docs/tutorial/overview/3_apis.html
     ... an instance of the SAXParserFactory classed is used ...
The suffix "ed" in "classed" is wrong and should be deleted.

http://java.sun.com/xml/jaxp/dist/1.1/docs/tutorial/sax/work/Echo01.java
(and same code in main text that refers to this listing:)
    public void endElement(String namespaceURI,
                           String sName, // simple name
                           String qName  // qualified name
                          )
    throws SAXException
    {
        emit("</"+sName+">");
    }
The code fails to handle the case where sName is empty
because all the info is in qName. See code for
startElement which is correct.