Developing the System of Web-Data Mining from Chemical Database Based on Internet

This article introduces a mining method of Web data in adoption of Web page comparison & analysis within a Web site in light of free chemistry database on Internet. On the basis of treeing and blocking Web pages, the data block of Web page is retrieved after compared and analyzed, and then the data is extracted via the comparison and judgment of more than one page of the same structure and format so as to actualize in-depth mining of technical information. The article elaborates the architectures and compositions of the system and the process of the system tested by the physical property databases of chemistry. The study lays down a basis for establishing search engine for databases.