For example, in Q A, terms which occur in questions are treated as more predictive for retrieval purposes. Etzioni, O. 1996. The exploration of structures is not a new approach. He suggested following three subtasks for Web mining, namely resource discovery , information extraction, and generalization. If there exists a web page that lists the names and email addresses of students at NTU, the mail agent should have the ability to extract the email address from the page, and then send the email.
Different agents have different information needs.
It needs to extract information from on line catalogs. The manual construction of a data model for the layer 0 of the database and the updating of this level due to the dynamic aspect of the Web. Resource discovery, that is locating documents and services on the Web. 2. Information extraction, that is extracting information from the discovered resources. Systemsj in a large database for mining.