"Nowadays there is a proliferation of selective dissemination of  information applications.  This is due to the fact that there is more and more dynamic information availbable through the web.  For example, we can easilty find in the Web information concerning stocks, sales, tickets, documents.  Web uses would like to be notifvied when new relevant information is produces.  A user may be interested in receiving a norification when a given stock reaches a certain value."

"A big challenge to build content based publish-subscdribe systems is to solve the trade-off between (matching) performance and the expressiveness of the publication and subscriptions language they can support.  Our research work focuses on designing scalable pattern-matching algorithms which enable powerful subscription languages on complex data.  These algorithms are the hear of our two publish and subscribe prototypes called Lwee Subscribe and WebFilter.  Bothe prototypes aim at Large-scale and High-trhoughput subscriptions processing for selective information dissemination on the internet and in Wireless enfironments."- goto