This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.
Which API would you use to parse XML data that was grammar based? A fundamental need is that if a message does not match a set of grammar rules (defined in applic.), the application indicates that it cannot be parsed.