Abstract: A search engine provider interacts with a content provider wherein the content provider provides content to the search engine provider. The content may comprise information that indicates a structure of the content provider's web pages. The search engine may use structural information to classify and extract data items from web pages, and to highlight those data items in search results with labels that identify each such data item's class.

Abstract: A search engine provider enters into an agreement with a content provider wherein the search engine provider agrees to provide compensation in exchange for the content provider giving content to the search engine provider. The content may comprise data that normally can't be accessed without a subscription, or any other content. The content may comprise information that indicates a structure of the content provider's web pages. The search engine may display normally inaccessible content with search results. The search engine may use structural information to classify and extract data items from web pages, and to highlight those data items in search results with labels that identify each such data item's class. A computing device determines the extent to which enhancement of the search results page using the content provider's content increased the revenue value of the page. The amount paid to the content provider may be based on this extent.