Abstract: Web data mining in a domain includes Web data extraction and Web data integration．In the phase of Web data extraction,the paper proposes a Web structural data model and a Web table schema,and puts forward the Web table positioning and records extracting algorithm．In the phase of Web data integration,a Web data integration algorithm based on the domain model is presented．The experiment results are given to show effectiveness of the proposed algorithms.

Key words: Web structural data model,Web table schema,Domain model,Domain data extraction and integration