Deep Web Navigation by Example

Large portions of the Web are buried behind user-oriented interfaces, which can only be accessed by filling out forms. To make the therein contained information accessible to automatic processing, one of the major hurdles is to navigate to the actual result page. In this paper we present a framework for navigating these so-called Deep Web sites based on the page-keyword-action paradigm: the system fills out forms with provided input parameters and then submits the form. Afterwards it checks if it has already found a result page by looking for pre-specified keyword patterns in the current page. Based on the outcome either further actions to reach a result page are executed or the resulting URL is returned.