Recent developments in web standards (HTML5, specifically Web Storage a.k.a. DOM Storage) indicates a move towards widespread availability of client (i.e. web browser) side persistent storage accessible by web applications. Initially useful for making content and applications available offline, this also open up the possibility of object replication between client and server. In this project you will explore the applicability of transaction concepts to applications built on this model. In particular, you will focus on identifying and exploiting new opportunities made available by the existence of persistent storage on the browser, a vital pre-requisite for recoverable transactions.