Patent ID: 6219676
Filing Date: 2001-04-17
Classification: H04L,Y10S

Abstract:
A method for allowing a web server to maintain coherency of web server data with a plurality of clients, the web server data comprising a plurality of web pages, each web page comprising a plurality of objects, the method comprising the steps of:defining at least one monitor area for the web server data;detecting at least one activity that occurs in the monitor area, the activity being a change to a web page;storing a reference value for the activity in at least one version of a change log at the web server, the change log being of a relatively small size, as compared to the monitor area, and the reference value indicating an object of the web page that has been changed by the activity;indicating a time when the reference value was stored in the change log, the time being accessible by a client for determining whether to retrieve the object identified by the reference value; andproviding the reference value to the client when the client accesses the web server, if the client so determines, thereby maintaining coherency with the web server,wherein the change log is separate from the web server data and the tracked activity is immediately provided to the client without accessing the web server data.