Study On Web Page Browsing And Query Based On Extended Tag Graph

Nowadays people could obtain multifarious information From the World Wide Web, but these sources are autonomous and usually contain heterogeneous data. This characteristic of the web data lead the web site's administrator cost large numbers of funds and energies to maintenance the web site. On the other hand, search engine as a representation of web information retrieval system, could service well in retrieval Within the whole web, but failed either to real-time retrieval, or retrieval inside the web page.Extend Tag Graph(for short: ETG) is an model for describing HTML Data .This model could represent the HTML tag structure efficiently .It also bring a new HTML data store scheme which supporting isolate the data From the tag pattern and solve the problem in web data storage optimize and maintenance fields.The Paper lucubrate the Web browsing and retrieval techniques based on ETG, and bring a new service framework for Virtual Web Page based on ETG model. This framework includes the method. for virtual page design, browsing and auto-generating. It isolates the data From the tag pattern, and be available to realize the well structured web data organize and management. The syntax of virtual page, the key algorithm of ETG auto- generating, the system framework discussed in this paper. The experimental systems show the ability to optimize the web data, and hide the detail to end-users.For the requirement of a detailed retrieval and reform inside the web page, a struct-based web query language has been discussed in the paper. We presented a new SQL-Like web query language called Tag Structure Query Language (for short: TagSQL) based on tag structure. This query language takes the advantage of Extend Tag Graph, have strong capabilities to describe the tag-node and the relationship inner the tag aggregate. With the research mentioned above, the web query techniques based on ETG and TagSQL has also been discussed in this paper. We present a experimental system PowerSearcher and the key techniques for supporting TagSQL. The paper presented the implement methods and key algorithms about Tag retrieval, reform, aggregate and real-time query. The proposed techniques implemented in PowerSearcher shows us the capabilities to retrieval and reform inside the web page in a mass of cases.The concept and techniques mentioned above bring forward a new implement framework for web page browsing and information retrieval, and should have the academic and applied value for the web information service of E-Commerce.