The Discovery and Extraction of Query Interfaces Based on Deep Web

With the prevalence of the massive online databases, the Web has become more and more deepened. Up to now, there exists lots of work which has been done in integration of query interface and extraction of query results. Because most Web pages are unstructured and dynamic, the discovery and extraction of query interfaces become the essential question needed to resolve. This paper is mainly a survey about the discovery and extraction of query interfaces. Meanwhile some new suggestions and methods are put forward in this paper.