Because it is the foundation of obtaining Deep Web information that searching the query interface of domain WDB(Web Database) automatically, form discovery method based on SE(Search Engine) and the other is to judge whether the form is query interface.

The information can only be accessed by the query interfaces provided by Web database.

As the amount of information on the Web increases rapidly,much Web information has been rapidly deepened by myriad searchable databases online,where data are hidden behind query interfaces.

Automatic query classification via constructing semantic lexicon;

A classify search engine based on Web autoclassifying;

By introducing semantic conflicts into web query interface integration and discussing the origins and categories of the semantic conflicts,an ontology-based schema matching method is proposed.