We will now describe our developed logical model for constructing HDLs 13.
The model includes processes, data repositories and auxiliary repositories. The
initiating IS invokes the Harvester with the DL harvesting request. The
Harvester generates the initial DL profile and passes this as the harvesting
query to the Locator component. The Locator uses various network search
techniques to enrich the initial collection of URLs to be harvested. The next
component to be invoked is the Gatherer. It uses each top-level URL, in a
recursive manner, to gather all referenced resources from the network providers,
and passes them to the Filtering component.