EVENT-BASED MAINTENANCE OF DIGITAL LIBRARY COLLECTIONS

We consider the problem of updating a digital library collection automatically when certain events occur. Existing digital library systems require the user to either re-build manually or to schedule re-building at specified times. Ideally, a collection should be re-built whenever some collection-changing event occurs. We propose the Event Monitor for Greenstone, a tool that continually tests for collection-altering events and re-builds the collection when these events occur. The Event Monitor interacts with the existing scheduling mechanism on the host system, thereby making it a simple yet powerful tool for event-based maintenance.