$ java -classpath stax.jar:.:bea.jar StAXChecker http://www.cafeconleche.org/ http://www.cafeconleche.org/ is well-formed $ java -classpath stax.jar:.:bea.jar StAXChecker http://www.xml.com/ http://www.xml.com/ is not well-formed javax.xml.stream.XMLStreamException: ParseError at [row,col]:[44,7] Message: could not resolve entity named 'nbsp'