Offline Ajax with Apache Derby
http://www.ibm.com/developerworks/opensource/library/os-ad-offline-ajax/index.html?S_TACT=105AGX44&S_CMP=EDU

Galpin, Michael
IBM
2008

Abstract:

People love Ajax applications so much that they are willing to use them instead of their desktop equivalents. The only problem occurs when they fail to have network access. This is when an offline feature is necessary. Apache Derby is a great option for enabling offline access to Ajax-powered applications. Learn how to use Apache Derby as a local data store that can be used to take your Ajax application offline.